Download - 1670.4-2004
-
AS 1670.42004
Australian Standard
Fire detection, warning, control and intercom systemsSystem design, installation and commissioning
Part 4: Sound systems and intercom systems for emergency purposes
AS
1670.4
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
This Australian Standard was prepared by Committee FP-002, Fire Detection, Warning, Control and Intercom Systems. It was approved on behalf of the Council of Standards Australia on 17 March 2004 and published on 23 April 2004.
The following are represented on Committee FP-002:
Audio Engineering Society
Australasian Fire Authorities Council
Australian Building Codes Board
Australian Chamber of Commerce and Industry
Australian Electrical and Electronic Manufacturers Association
Australian Industry Group
Australian Institute of Building Surveyors
Deafness Forum, of Australia
Department of Defence
Fire Protection Association Australia
Institute of Security Executives
National Electrical Contractors Association Australia
Property Council of Australia
Scientific Services Laboratory AGALDepartment of Administrative Services
Keeping Standards up-to-date
Standards are living documents which reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and new editions are published. Between editions, amendments may be issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments which may have been published since the Standard was purchased.
Detailed information about Standards can be found by visiting the Standards Web Shop at www.standards.com.au and looking up the relevant Standard in the on-line catalogue.
Alternatively, the printed Catalogue provides information current at 1 January each year, and the monthly magazine, The Global Standard, has a full listing of revisions and amendments published each month.
Australian StandardsTM and other products and services developed by Standards Australia are published and distributed under contract by SAI Global, which operates the Standards Web Shop.
We also welcome suggestions for improvement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at [email protected], or write to the Chief Executive, Standards Australia International Ltd, GPO Box 5420, Sydney, NSW 2001.
This Standard was issued in draft form for comment as DR 02376.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004
Australian Standard
Fire detection, warning, control and intercom systemsSystem design, installation and commissioning
Part 4: Sound systems and intercom systems for emergency purposes
Originated as part of AS 22201978. Previous edition AS 2220.21989. Revised and redesignated as AS 1670.42004.
COPYRIGHT
Standards Australia International
All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher.
Published by Standards Australia International Ltd GPO Box 5420, Sydney, NSW 2001, Australia
ISBN 0 7337 5857 6
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 2
2
PREFACE
This Standard was prepared by the Standards Australia Committee FP-002, Fire Detection,
Warning, Control and Intercom Systems, to supersede AS 2220.21989, Emergency
warning and intercommunication systems in buildings, Part 2: System design, installation
and commissioning.
The objective of this Standard is to specify the design, installation and commissioning
requirements for an evacuation and intercommunication system used in a building for the
safe evacuation of the building occupants in the event of a fire alarm.
AS 2220.21989 specified requirements for the installation of emergency warning and
intercommunication systems. This part of AS 1670 is drafted on the basis of functions that
are to be provided on all sound systems and intercom systems for emergency purposes and
optional functions (with requirements), which may be provided. The optional functions
enable the system to be installed to include either the warning functions or the intercom
functions, or both. It is intended that the options be used for specific applications when
required.
For the first time this Standard permits the installation of specific components that comply
with international equipment Standards (issued as AS Standards) and EN 54, Fire detection
and fire alarm systems. Committee FP-002 intends to withdraw existing Australian
equipment Standards where international Standards exist; however, this will take effect five
years after the publication of the Australian adoption of the international Standards.
This Standard will be referenced in the Building Code of Australia 2004, thereby
superseding AS 2220.21989, which will be withdrawn 12 months from the date of
publication of this Standard.
This Standard may be used in conjunction with the fire detection system installation
requirements specified in AS 1670.1 to form a complete fire detection, warning, control and
intercom system.
Maintenance requirements for control and indicating equipment are given in AS 1851,
Maintenance of fire protection equipment.
The terms normative and informative have been used in this Standard to define the
application of the appendix to which they apply. A normative appendix is an integral part
of a Standard, whereas an informative appendix is only for information and guidance.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
3 AS 1670.42004
CONTENTS
Page
FOREWORD.............................................................................................................................. 5
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE ........................................................................................................................ 6
1.2 APPLICATION ........................................................................................................... 6
1.3 REFERENCED DOCUMENTS .................................................................................. 6
1.4 DEFINITIONS ............................................................................................................ 7
1.5 COMPLIANCE WITH OTHER STANDARDS .......................................................... 8
1.6 INTERPRETATION OF SPECIFIED LIMITING VALUES ...................................... 8
SECTION 2 GENERAL INSTALLATION REQUIREMENTS
2.1 INDICATOR PANELS................................................................................................ 9
2.2 DISTRIBUTED EQUIPMENT PROTECTION......................................................... 10
2.3 WIRING .................................................................................................................... 10
2.4 EMERGENCY PROCEDURES ................................................................................ 10
2.5 OPERATORS INSTRUCTIONS.............................................................................. 11
2.6 INSTALLERS STATEMENT.................................................................................. 11
SECTION 3 POWER SUPPLY
3.1 GENERAL ................................................................................................................ 12
3.2 MAIN POWER SOURCE ......................................................................................... 12
3.3 STAND-BY POWER SOURCE ................................................................................ 12
3.4 POWER SOURCE RATING ..................................................................................... 12
3.5 BATTERY CAPACITY ............................................................................................ 13
3.6 CHARGING CURRENT........................................................................................... 13
3.7 BATTERIES AND ENCLOSURES .......................................................................... 13
3.8 ANCILLARY LOADS .............................................................................................. 14
SECTION 4 SOUND SYSTEM INSTALLATION REQUIREMENTS
4.1 GENERAL ................................................................................................................ 15
4.2 COMPONENTS ........................................................................................................ 15
4.3 FUNCTIONAL REQUIREMENTS........................................................................... 15
4.4 WIRING .................................................................................................................... 17
4.5 LOUDSPEAKERS .................................................................................................... 19
SECTION 5 INTERCOM SYSTEM INSTALLATION REQUIREMENTS
5.1 GENERAL ................................................................................................................ 21
5.2 COMPONENTS ........................................................................................................ 21
5.3 WARDEN INTERCOM POINTS.............................................................................. 21
5.4 WIRING .................................................................................................................... 22
SECTION 6 COMMISSIONING
6.1 GENERAL CHECKS ................................................................................................ 25
6.2 SPECIFIC SOUND SYSTEM CHECKS................................................................... 25
6.3 SPECIFIC INTERCOM SYSTEM CHECKS ............................................................ 26
6.4 DOCUMENTATION................................................................................................. 26
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 4
4
Page
APPENDICES
A MEASUREMENT OF SPEECH INTELLIGIBILITY ............................................... 28
B METHODS OF MEASURING SPEECH INTELLIGIBILITY.................................. 30
C WIRING SYSTEMS RATING .................................................................................. 33
D STANDARD FORM OF INSTALLERS STATEMENT
FOR SOUND SYSTEM AND INTERCOM SYSTEM.............................................. 35
E COMMISSIONING TEST REPORT......................................................................... 37
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
5 AS 1670.42004
FOREWORD
A sound system and intercom system for emergency purposes is a life-safety system for
installation within a building or site. The purpose is to provide assistance in the orderly
evacuation of personnel in emergencies such as, but not limited to, fire, smoke, civil
commotion, bomb threats, siege, explosion, leakage of toxic substances or fumes and
structural damage. A guide to the development of evacuation procedures is described in
AS 3745.
To achieve this aim, the sound system and intercom system has the following capabilities as
appropriate:
(a) Receive alarm signals from a detection system.
(b) Delivery of intelligible speech for emergency announcements and directions.
(c) Audible, and where required, visual emergency signals.
(d) Provision for automatic and manual operation.
(e) Continuous operation under conditions of the emergency.
(f) Independence from other systems in manual operation.
(g) Provide a positive means of communication between the chief warden and the various
floor or area wardens.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 6
Standards Australia www.standards.com.au
6
STANDARDS AUSTRALIA
Australian Standard
Fire detection, warning, control and intercom systemsSystem design, installation and commissioning
Part 4: Sound systems and intercom systems for emergency purposes
S E C T I O N 1 S C O P E A N D G E N E R A L
1.1 SCOPE
This Standard specifies requirements for the design, installation and commissioning of
sound systems and intercom systems for emergency purposes comprising components
complying with the requirements of the appropriate product Standards.
NOTE: The general procedures for the use of the sound system and intercom system and the
response of personnel are given in AS 3745.
1.2 APPLICATION
The requirements of this Standard apply to the installation of a sound system and intercom
system installed either stand alone or as an integral part of a fire detection and warning
system. Where the sound system functions are required, they shall be installed in
accordance with the requirements of Section 4. Where the intercom system functions are
required, they shall be installed in accordance with the requirements of Section 5.
1.3 REFERENCED DOCUMENTS
AS
1259 AcousticsSound level meters (all parts)
1428 Design for access and mobility
1428.2 Part 2: Enhanced and additional requirementsBuildings and facilities
1603 Automatic fire detection and alarm systems
1603.5 Part 5: Manual call points
1603.11 Part 11: Visual warning devices
1670 Fire detection, warning, control and intercom systemsSystem design,
installation and commissioning
1670.1 Part 1: Fire
1670.4 Part 4: Sound systems and intercom systems for emergency purposes
2220 Emergency warning and intercommunication systems in buildings
2220.1 Part 1: Equipment design and manufacture
2293 Emergency evacuation lighting for buildings
2293.1 Part 1: System design, installation and operations
2484 FireGlossary of terms
2484.2 Fire protection and firefighting equipment
2659 Guide to the use of sound measuring equipment
2659.1 Part 1: Portable sound level meters
2676 Guide to the installation, maintenance, testing and replacement of secondary
batteries in buildings (all parts) Acc
esse
d by
AUR
ECO
N PT
Y LT
D on
24
May
201
2
-
7 AS 1670.42004
www.standards.com.au Standards Australia
AS
2706 Numerical valuesRounding and interpretation of limiting values
3745 Emergency control organization and procedures for buildings
4029 Stationary batteriesLead acid (all parts)
4428 Fire detection, warning, control and intercom systemsControl and indicating
equipment
4428.0 Part 0: General requirements and test methods
4428.4 Part 4: Intercommunication systems for emergency purposes
60849 Sound systems for emergency purposes
AS/NZS
3000 Electrical installations (known as the Australian/New Zealand Wiring Rules)
3013 Electrical installationsClassification of the fire and mechanical performance
of wiring systems
3100 Approval and test specificationGeneral requirements for electrical equipment
60950.1 Information technology equipmentSafetyGeneral requirements
AS/ACIF
S009 Installation requirements for customer cabling
ABCB
BCA Building Code of Australia
EN
54-11 Manual call points
ISO
TR 4870 Acoustics; the construction and calibration of speech intelligibility tests
7731 ErgonomicsDanger signals for public and work areasAuditory danger
signals
8201 AcousticsAudible emergency evacuation signal
IEC
60268 Sound system equipment
60268-16 Part 16: Objective rating of speech intelligibility by speech transmission
index
ANSI
S3.5 Methods for the calculation of the articulation index
1.4 DEFINITIONS
For the purpose of this Standard the definitions given in AS 2484.2, the Building Code of
Australia (BCA) and those below apply:
1.4.1 Alert signal
An audible signal complying with ISO 7731 or a visual signal, or a combination of audible
and visual signals that call attention to the possibility of a hazardous or dangerous situation.
NOTE: It is recommended that the default alert signal complying with ISO 7731 consist of a
420 Hz square wave with an on period of 0.6 s and an off period of 0.6. Other signals may be
more appropriate for use where the ambient noise will mask the signal.
1.4.2 Discharged battery
A battery that has reached the minimum CIE operating voltage.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 8
Standards Australia www.standards.com.au
8
1.4.3 Emergency call point
A device complying with the requirements of AS 1603.5 or EN 54-11 with the exception
that it is coloured white and bears the legend emergency alarm.
1.4.4 Evacuate signal
An audible or visual signal or a combination of audible and visual signals, complying with
ISO 8201, that means evacuate the building immediately.
NOTE: It is recommended the default evacuate signal complying with ISO 8201 consist of a
uniformly increasing frequency from 500 Hz to 1200 Hz during the 0.5 s on phase of the signal.
Other signals may be more appropriate for use where the ambient noise will mask the signal.
1.4.5 Evacuation zone
A subdivision of the premises that can be evacuated separately from any other subdivision.
NOTE: The term evacuation zone is used interchangeably with the term emergency zone used in
AS 60849.
1.4.6 Warning signal
An alert signal or evacuate signal or a combination of alert and evacuate signals.
1.5 COMPLIANCE WITH OTHER STANDARDS
The sound system and intercom system shall comply with the appropriate electrical safety
requirements specified in AS/NZS 3000 and the individual parts of the installation shall
comply with the appropriate Standards listed in Clause 1.3.
1.6 INTERPRETATION OF SPECIFIED LIMITING VALUES
For the purpose of assessing compliance with this Standard, the specified values herein
shall be interpreted in accordance with the rounding method described in AS 2706, that is,
the observed or calculated value shall be rounded to the same number of figures as in the
specified limiting value and then compared with the specified limiting value. For example,
for specified limiting values of 2.5, 2.50, and 2.500, the observed or calculated value would
be rounded respectively to the nearest 0.1, 0.01 and 0.001.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
9 AS 1670.42004
www.standards.com.au Standards Australia
S E C T I O N 2 G E N E R A L I N S T A L L A T I O N
R E Q U I R E M E N T S
2.1 INDICATOR PANELS
2.1.1 Location
The indicator panels shall be installed in approved locations complying with the following
requirements:
(a) The area shall be secure from unauthorized access.
(b) The ambient noise level at the indicator panel shall be not greater than 70 dB(A).
NOTE: This Standard expects the ambient noise level to be assessed taking into consideration
the unusual circumstances of an emergency. For example, during a fire, it is expected that a
fire brigade booster pump may be operating outside the building, possibly increasing the
noise level in the lobby area above 70 dB(A). The lobby area in this case would be unsuitable,
for the indicator panel, unless provisions were made for its acoustic isolation.
(c) Access to the indicator panel shall not be obstructed.
(d) Operation of the indicator panel shall not obstruct the evacuation of the building.
(e) Visible indications shall remain readily distinguishable under all ambient lighting
conditions.
(f) All controls and indicators shall be not less than 750 mm and not more than 1850 mm
above floor level.
(g) The indicator panel shall be located in an area that presents a low risk of damage to
the equipment and injury to personnel in an emergency.
NOTE: It is recommended that a telephone, with access to the public network, be provided in
the vicinity of the indicator panel.
2.1.2 Physical working environment
The following physical working environment requirements shall apply:
(a) Lighting In addition to the normal lighting pertaining to the area in which the
indicator panel is installed, emergency lighting complying with AS 2293.1 shall be
provided.
(b) Workspace The workspace for operational personnel shall be arranged so as to
minimize distraction by peripheral activities and its plan dimensions shall be not less
than those specified in Figure 2.1.
(c) Enclosure The CIE may share a common or adjoining enclosure with other CIE
complying with AS 4428 provided that the controls are located such that they can be
used by a separate individual to that operating fire CIE.
(d) Safety The area shall be free of ignition sources and stored combustible materials.
Areas such as electrical switch rooms, store rooms and the like, are not acceptable
locations.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 10
Standards Australia www.standards.com.au
10
DIMENSIONS IN MILLIMETRES
FIGURE 2.1 INDICATOR PANELPERSONNEL WORKSPACE
2.2 DISTRIBUTED EQUIPMENT PROTECTION
Distributed equipment, serving other than the fire compartment in which it is installed, shall
be installed in a fire-isolated area that is free from ignition sources and stored combustible
materials.
2.3 WIRING
2.3.1 Wiring protection
The wiring of the sound system and intercom system shall comply with the requirements of
AS/NZS 3000, AS/NZS 3013. It shall be stranded, except where mineral insulated metal
sheathed (MIMS) cable is used, and shall have a cross-sectional area of not less than
0.75 mm2. It shall be dedicated to sound system and intercom system functions, except that
the wiring may be shared with systems complying with other parts of the AS 1670, provided
that the wiring complies with the most onerous requirements of the relevant part of
AS 1670.
In no case shall the wiring required by this clause conflict with the requirements of the
AS/ACIF S009.
2.3.2 Joints and terminations
Joints and terminations shall be made only in a suitably labelled enclosed terminal box
employing fixed terminations, and rated the same as the cable, in accordance with
AS/NZS 3013, where applicable.
Joints and terminations associated with vertical riser cables shall be made within the
associated fire-isolated duct.
2.3.3 Separation from other systems
The wiring of the sound system, intercom system and associated extra-low voltage (ELV)
circuits shall be separate and distinct from power and light circuits (see AS/ASIF S009 for
segregation of wiring systems requirements).
2.4 EMERGENCY PROCEDURES
A procedure providing instructions to be followed in case of emergency shall be positioned
adjacent to each indicator panel.
NOTE: The procedure is not specified in this Standard and depends on the type of building, type
of system and evacuation procedures required (see AS 3745).
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
11 AS 1670.42004
www.standards.com.au Standards Australia
2.5 OPERATORS INSTRUCTIONS
Operators instructions complying with the requirements of AS 4428.0 shall be attached to,
or mounted, adjacent to all intercom panels.
These instructions shall be readily visible and legible, and shall be designed to remain so
after being in service for the expected life of the system.
2.6 INSTALLERS STATEMENT
The installer shall complete a statement outlining the installation criteria for sound system
and intercom system.
NOTE: A typical example of an installers statement is given in Appendix D.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 12
Standards Australia www.standards.com.au
12
S E C T I O N 3 P O W E R S U P P L Y
3.1 GENERAL
When calculating the capacity of the power supply, consideration shall be made to
accommodate any ancillary loads.
Where the CIE uses a power supply common with other permitted CIE, the power supply
shall comply with the most onerous requirement of any of the connected CIE and each CIE
supply feed shall be provided with an isolation switch and over-current protection.
3.2 MAIN POWER SOURCE
The CIE shall be energized by a reliable source of supply and shall be connected in
accordance with AS/NZS 3000. The power source shall be either
(a) an a.c. supply from an electricity authority; or
(b) a source of equal quality and reliability to Clause 3.2(a).
3.3 STAND-BY POWER SOURCE
The system shall be provided with a stand-by power source that is capable of operating the
system should the main power source fail.
Where the stand-by power source is a battery, the battery shall comply with the
requirements of AS 4029.
3.4 POWER SOURCE RATING
3.4.1 Main power source
The main power source shall be capable of operating the system in its quiescent state,
including any quiescent ancillary load and all fault and isolation indication loads without
reliance on the stand-by power source. Where the main power source is also used for
charging the batteries it shall simultaneously charge the batteries as specified in Clause 3.6.
The main power supply shall be capable of supplying the sum of main power source loads
specified in each of the CIE system design, installation and commissioning Standards.
A typical set of calculations may be as follows:
CQPSU III += and
( )ACIEQCIEQANCQSQ , ofgreaterthe IIIII ++=
where
IPSU = total current required to power the system in its quiescent state and to
charge the battery
IQ = total quiescent current
IC = charging current calculated in Clause 3.6
IQS = highest quiescent current of the system
IQANC = any quiescent ancillary load connected
IQCIE = quiescent load of all other CIE connected
IACIE = any alarm current of other CIE required to be supplied by the main power
source
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
13 AS 1670.42004
www.standards.com.au Standards Australia
3.4.2 Stand-by power source
The stand-by power source shall be capable of supplying all quiescent loads for at least 24 h
followed by not less than 30 min operation at full load. Where the stand-by power source is
a battery, the battery capacity shall be calculated in accordance with Clause 3.5.
3.5 BATTERY CAPACITY
When calculating battery capacity, allowance shall be made for the expected loss of
capacity over the useful life of the battery. A new battery shall be at least 125% of the
calculated capacity requirements, based on a loss of 20% of its capacity over the useful life
of the battery.
The battery capacity requirement shall be determined as follows:
(a) Determine the quiescent load current (IQ).
(b) Determine the full load current (IA).
(c) Determine the capacity de-rating factor (Fc) of the battery when discharged at the full
load rate taking into account the minimum operating voltage of the connected CIE
using the battery manufacturers data. Where more than one CIE is connected to the
battery, use the highest minimum of any of the CIEs. A value of 2 for FC is deemed
to satisfy these requirements.
(d) The 20 h discharge battery capacity C20 at 15C to 30C shall be determined as
follows:
C20 = 1.25 ((IQ TQ) + Fc (IA TA))
where
C20 = battery capacity in Ah at 20 h discharge rate
IQ = total quiescent current
TQ = quiescent stand-by power source time (normally 24 h)
Fc = capacity de-rating factor
IA = total current in alarm state
TA = alarm load stand-by power source time (normally 0.5 h)
1.25 = compensation factor for expected battery deterioration
Where the load may vary, the worst case average over any 24 h period shall be used.
Where the average battery temperature is outside 15C to 30C, the battery manufacturers
data shall be used to determine any further compensation factor to be applied.
3.6 CHARGING CURRENT
The battery charging current shall return a charge to a discharged battery to 80% of its
maximum rated capacity within 24 h.
3.7 BATTERIES AND ENCLOSURES
3.7.1 General
Batteries shall be located and installed in accordance with the requirements of the relevant
part of AS 2676 and the manufacturers recommendations.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 14
Standards Australia www.standards.com.au
14
3.7.2 Battery enclosures
The battery and enclosure shall be readily accessible for inspection.
Battery enclosures shall be secured from unauthorized persons by a locked door. The key
shall be identical with other keys required for access to the control and indicating
equipment
For non-sealed batteries, the battery enclosure shall not be above the enclosure of any CIE.
The connecting leads to the battery shall be clearly labelled to reduce the possibility of
reverse connections to the battery. The battery shall not be tapped for intermediate voltages
and all connections shall be made using suitable connectors.
Where batteries are not adjacent to the indicator panels, all cabling shall have a minimum
rating of WS51W, in accordance with Appendix C, with the mechanical rating upgraded
dependent upon the hazard as defined in AS/NZS 3013.
3.8 ANCILLARY LOADS
Connected ancillary loads shall be provided with current limiting or overload protection.
Ancillary control devices or isolation relays external to the CIE shall be installed within
protective enclosures and shall be marked or labelled with the words EMERGENCY
SYSTEM.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
15 AS 1670.42004
www.standards.com.au Standards Australia
S E C T I O N 4 S O U N D S Y S T E M I N S T A L L A T I O N
R E Q U I R E M E N T S
4.1 GENERAL
Where the installation includes a sound system for emergency purposes, the additional
requirements of Section 4 shall be met.
4.2 COMPONENTS
The sound system shall comprise
(a) control and indicating equipment complying with AS 60849 or AS 2220.1;
(b) emergency call points;
(c) audible warning devices; and
(d) visual warning devices (where applicable) complying with AS 1603.11.
The individual components shall be compatible and selected in order to achieve stable and
reliable performance. The system shall use components in accordance with the component
manufacturers specifications.
Compliance of equipment required by Items (a), (b), (c) and (d) of this Clause shall have a
product listing by an internationally recognized fire protection listing organization
acceptable to the authority having jurisdiction. The product listing criteria shall include a
periodic audit to verify continued compliance.
4.3 FUNCTIONAL REQUIREMENTS
4.3.1 Distribution of audible signals
The audible warning signals shall be distributed throughout the appropriate zones by a
system of loudspeakers.
NOTES:
1 It is recommended that at least one power amplifier be provided for each zone.
2 Consideration should be given to the need for the distribution of warning signals for the
hearing impaired via means other than loudspeakers, such as
(a) visual warning devices (see AS 1603.11);
(b) induction loop systems (see AS 1428.2) where it augments a sound re-enforcement
system; and
(c) other sensory systems.
4.3.2 Initiation
The sound system shall be initiated by either a detection system, emergency call points or at
each indicator panel. Emergency call points shall be installed at the following locations:
(a) Each indicator panel.
(b) Adjacent to each warden intercom point (WIP) (when installed).
(c) Areas of the zone not protected by detection or suppression systems.
Manual call points connected to the fire detection system and installed in the above
locations shall meet the requirements of this Clause.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 16
Standards Australia www.standards.com.au
16
4.3.3 Alert signal duration
Unless otherwise specified in the building emergency management plan, the alert signal
duration shall be set to 0 s such that only the evacuation signal shall be produced.
Where the alert signal is used, it shall continue to operate until manual control of the
system is taken or, if not responded to in a prescribed time from initiation, shall be
automatically replaced by an evacuation signal. The prescribed time shall be established to
suit the building in question but shall not exceed 10 min.
NOTE: For buildings over 25 m effective height, determined in accordance with the BCA, the
alert signal duration and any automatic sequencing of the evacuation signal should consider
horizontal and vertical exiting, occupant characteristics, the building design approach, affected
compartments and adjacent compartments as a sequence, and management in use principles.
4.3.4 Output of loudspeakers
At all places within the evacuation zone within a building where warning signals are
conveyed to building occupants, the A-weighted sound pressure level during the on phases
of the audible warning signals, measured with the time-weighting characteristic F (Fast)
(see AS 1259), shall exceed by a minimum of 10 dB the ambient sound pressure level
averaged over a period of 60 s, shall not be less than 65 dB and not more than 105 dB.
These values shall be determined in accordance with AS 2659.1.
NOTE: Measurement should be taken in the normal standing positions on the floor of coverage.
If the audible warning signals are intended to arouse sleeping occupants, the minimum
A-weighted sound pressure level of the signal shall be 75 dB at the bedhead, with all doors
closed.
NOTE: 75 dB(A) may not be adequate to awaken all sleeping occupants.
The performance of the sound system under stand-by power source operation shall not
cause audible emergency signals to fall by more than 6 dB sound pressure level (SPL)
below the required sound level when tested after 24 h of quiescent operation and the period
required to evacuate the premises, which shall in no case be less than 30 min.
Loudspeakers installed within the vicinity of any sound system panel or warden intercom
point (WIP) shall not inhibit nor adversely affect the operation of the system. In particular
care shall be taken that the proximity and power setting for any speakers near the sound
system panel do not cause acoustic feedback when the microphone is used.
Where occupants, such as patients in hospital wards, must not be subject to possible stress
imposed by loud noises, the sound pressure level and content shall be arranged to provide
warning for the staff and minimize trauma.
4.3.5 Voice message
The evacuation signal shall include a verbal messages stating emergency and evacuate
now. These messages shall be inserted in the evacuation signal in accordance with
ISO 8201.
NOTE: ISO 8201 permits longer additional voice messages to be inserted between evacuate signal
cycles. It is recommended that more detailed messages, giving specific instructions, be included
as part of the system design.
4.3.6 Intelligibility
At all places within the zone where ambient noise figures are less than 85 dB(A), the speech
transmission index (STI) shall be 0.5. The rating of speech intelligibility shall be in
accordance with the common intelligibility scale (CIS) method of AS 60849, measured in
accordance with Appendix A. The average speech SPL shall not exceed 110 dB(A).
NOTE: Methods of measuring speech intelligibility are given in Appendix B.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
17 AS 1670.42004
www.standards.com.au Standards Australia
The performance of the sound system under stand-by power source operation shall not
cause the CIS index to fall below 0.65 (0.45 STI) when tested after 24 h of quiescent
operation and the period required to evacuate the premises, which shall in no case be less
than 30 min.
4.3.7 Visual warning devices and tactile warning devices
In areas having high ambient noise levels, the audible warning system shall be reinforced
by a system of visual warning devices or other devices, to provide sensory stimulation
adequate for the needs of the person at risk. The temporal pattern described in ISO 8201
shall be imposed on the visual and tactile evacuation signals.
Visual warning devices shall be installed in areas where the background A-weighted
ambient noise level exceeds 95 dB(A) or where the wearing of hearing protection devices is
required (see AS 1269), or where required by the BCA for hearing impaired persons.
4.3.8 Interconnection to the fire CIE
The sound system shall be interconnected with the fire CIE where provided. Any fault
condition on the sound system shall be annunciated at the fire CIE.
Any fire CIE connected to the sound system shall have an isolate facility to allow the fire
detection system to be tested without initiating operation of the sound system.
4.3.9 Use of the sound system for non-emergency purposes
The sound system may be used for public address or background music under non-
emergency conditions provided that
(a) the CIE is designed to override these functions as specified in AS 60849;
(b) the capacity of the power supply unit provides sufficient current and meets any
additional non-emergency load imposed;
(c) the system integrity is maintained; and
(d) specified continuous fault monitoring and indicating functions are maintained.
4.4 WIRING
4.4.1 Wiring protection
All cabling required to have protection (see Table 4.1 and Figure 4.1) shall have a minimum
rating of WS51W, in accordance with Appendix C, with the mechanical rating upgraded
dependent upon the hazard as defined in AS/NZS 3013.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 18
Standards Australia www.standards.com.au
18
TABLE 4.1
PROTECTION REQUIREMENTS ON CABLING AND SPECIFIC COMPONENTS
Component Requirement
(a) Trunk cabling
(i) Cables, including joints and terminations, that
traverse any fire compartment to service another fire
compartment
Protection required
See Clause 4.4.1
(ii) Cables, including joints and terminations, that
traverse any evacuation zone to service another
evacuation zone
Protection required
See Clause 4.4.1
(b) Zone cabling
(i) Cables, including joints and terminations, running
within a single fire compartment not traversing an
evacuation zone boundary
Protection not required
(ii) Cables, including joints and terminations running
within a single evacuation zone and traversing a fire
compartment boundary
Protection not required
(c) Fire CIE interface cabling
Cables, including joints and terminations, between
fire CIE and sound system CIE
Protection required, except where the
equipment is in the same room and not
separated by more than 2 m
See Clause 4.4.1
(d) Indicator panel interconnection
Cables, including joints and terminations, between indicator
panels and sound system CIE
Protection required
See Clause 4.4.1
(e) Zone-terminating equipment
Speakers, lights and emergency call points Protection not required
(f) Distributed equipment Protection required (see Clause 4.5.1)
(g) Stand-by power source cabling Protection required, except where the
equipment is in the same room and not
separated by more than 2 m
See Clause 4.4.1
4.4.2 Integrity of circuits
Wiring between indicator panels, remote amplification equipment, fire indicator panel
(FIP), evacuation zone loudspeakers and emergency call points shall be arranged so that a
single short-circuit or open-circuit within a cable in any emergency zone shall not affect the
normal operation of any other emergency zone.
4.4.3 Circuit supervision
Where fault supervision of the system field wiring is required, any condition that will affect
the normal operation of the system shall be detected and reported at all indicator panels.
This shall include the removal of any actuating or output device that is a dedicated part of
the sound system (see Table 4.2).
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
19 AS 1670.42004
www.standards.com.au Standards Australia
TABLE 4.2
SUPERVISION REQUIREMENTS ON SIGNAL LINES
Connection Monitoring requirements
(a) Loudspeaker lines between sound system CIE and loud
speakers
Open-circuit and short-circuit
(b) Outgoing signal lines between sound system CIE and visual
alarm
Open-circuit and short-circuit
(c) Alarm-initiating signal lines
(i) All alarm-initiating signal lines between sound system
CIE and fire CIE
NOTE: This may be satisfied by the warning system
supervisor specified by the fire CIE or the sound
system CIE.
Open-circuit and short-circuit. Short-
circuit may be interpreted as a fire
alarm
(ii) Alarm-initiating signal lines between sound system CIE
and emergency call points
Open-circuit and short-circuit. Short-
circuit may be interpreted as a sound
system alarm
(d) Signal lines between physically separated parts of the sound
system CIE
Open-circuit and short-circuit
(e) Sound system CIE fault signal to fire CIE Open-circuit and short-circuit
4.5 LOUDSPEAKERS
4.5.1 General
Loudspeakers shall be permanently fixed in position.
4.5.2 Connection facilities
Each incoming and outgoing conductor of the same potential shall be connected to a
separate screw or clamping facility. Terminal blocks shall be securely fixed to the
loudspeaker. Terminals shall only be accessible with the use of tools.
Speakers required to operate at voltages above ELV shall comply with the appropriate
requirements of AS/NZS 3100 or AS/NZS 60950.1.
4.5.3 Stress on conductors and terminals
Conductors shall be so supported and connected that there will be no undue mechanical
stress on the conductors or the terminations to which they are connected.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 20
Standards Australia www.standards.com.au
20
FIGURE 4.1 TYPICAL SOUND SYSTEM CABLE PROTECTION SCHEMATIC
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
21 AS 1670.42004
www.standards.com.au Standards Australia
S E C T I O N 5 I N T E R C O M S Y S T E M
I N S T A L L A T I O N R E Q U I R E M E N T S
5.1 GENERAL
Where the installation includes an intercom system, the additional requirements of
Section 5 shall be met.
5.2 COMPONENTS
The intercom system shall comprise
(a) control and indicating equipment complying with AS 4428.4 or AS 2220.1; and
(b) warden intercom point handset.
Compliance of equipment required by Items (a) and (b) of this Clause shall have a product
listing by an internationally recognized fire protection listing organization acceptable to the
authority having jurisdiction. The product listing criteria shall include a periodic audit to
verify continued compliance.
5.3 WARDEN INTERCOM POINTS
5.3.1 General
The WIP shall be located to enable the warden to readily control the evacuation of the
building occupants in an emergency.
NOTE: WIP handsets should not be located adjacent to loudspeakers or sounders.
5.3.2 Sound levels during and emergency
The anticipated SPL in the vicinity of each WIP location during an emergency shall not
adversely effect the ability of a warden to communicate with the intercom panel.
5.3.3 Location
WIP handsets shall be located in the following areas:
(a) On each floor, as determined by the emergency control organization defined in
AS 3745.
(b) At the designated building entry point in accordance with AS 1670.1 (if remote from
the intercom panel).
(c) In each zone, if each floor is divided into two or more emergency zones, as
determined by the emergency control organization defined in AS 3745.
(d) In each designated emergency lift.
(e) If required by the fire service, in or adjacent to pump rooms, sprinkler valve rooms
and hydrant relay booster pump sets.
(f) Adjacent to the FIP (if remote from the intercom panel).
The WIP handset shall be mounted at a height of not less than 1200 mm and not more than
1800 mm above finished floor level.
WIP handsets shall be permanently fixed in position.
5.3.4 Connection facilities
Each conductor shall be connected to a separate screw or clamping facility. Terminal blocks
shall be securely fixed. Terminals shall only be accessible with the use of tools. Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 22
Standards Australia www.standards.com.au
22
5.3.5 Stress on conductors and terminals
Conductors shall be so supported and connected that there will be no undue mechanical
stress on the conductors or the termination to which they are connected.
5.3.6 Crosstalk, clarity and intelligibility
Crosstalk, clarity and intelligibility of conversation between the WIP handset and the
intercom panel after installation shall not suffer degradation below the minimum
requirement of AS 4428.4.
5.3.7 Aural call signal
The WIP aural call signal shall have a sound pressure level (SPL) of not less than 80 dB(A)
when measured at a distance of 1 m from the WIP. The SPL of the WIP handset aural call
signal shall also be met when the WIP handset is mounted within a security enclosure.
5.4 WIRING
5.4.1 Wiring protection
All cabling required to have protection (see Table 5.1 and Figure 5.1) shall have a minimum
rating of WS51W, in accordance with Appendix C, with the mechanical rating upgraded
dependent upon the hazard as defined in AS/NZS 3013.
TABLE 5.1
PROTECTION REQUIREMENTS ON CABLING AND SPECIFIC COMPONENTS
Component Requirement
(a) Trunk cabling
(i) Cables, including joints and terminations, that traverse any fire
compartment to service another fire compartment
Protection required
See Clause 5.4.1
(ii) Cables, including joints and terminations, that traverse any
emergency zone to service another emergency zone
Protection required
See Clause 2.3.1
(b) Zone cabling
(i) Cables, including joints and terminations, running within a
single fire compartment not traversing an emergency zone
boundary
Protection not required
(ii) Cables, including joints and terminations, running within a
single emergency zone and traversing a fire compartment
boundary
Protection not required
(c) Cables, including joints and terminations between intercom panels Protection required
See Clause 2.3.1
(d) Zone terminating equipment for WIP handsets Protection not required
(e) Distributed equipment Protection required
See Clause 2.2 and 5.4.1
(f) Stand-by power source cabling Protection required, except
where the equipment is in the
same room and not separated
by more than 2 m
See Clause 4.4.1
5.4.2 Integrity of circuits
Wiring between CIE, intercom panels and WIPs shall be arranged so that a single short-
circuit or open-circuit within a cable in any emergency zone shall not affect the normal
operation of any other emergency zone.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
23 AS 1670.42004
www.standards.com.au Standards Australia
5.4.3 Circuit Supervision
Where supervision of the system field wiring is required, any condition that will affect the
normal operation of the system shall be detected and reported at the intercom panel. This
shall include the removal of any actuating or output device that is a dedicated part of the
intercom system (see Table 5.2).
TABLE 5.2
CIRCUIT SUPERVISION REQUIREMENTS ON SIGNAL LINES
Connection Circuit supervision requirements
Intercom system call signal and speech lines between Intercom CIE
and WIP handsets
Open-circuit and short-circuit
Signal lines between components of the intercom CIE and panels if
not co-located Supervision
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 24
Standards Australia www.standards.com.au
24
FIGURE 5.1 TYPICAL INTERCOM SYSTEM CABLE PROTECTION SCHEMATIC
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
25 AS 1670.42004
www.standards.com.au Standards Australia
S E C T I O N 6 C O M M I S S I O N I N G
6.1 GENERAL CHECKS
On completion of the installation of the sound system and intercom system, all equipment
shall be checked to ascertain that it has been installed and interconnected in accordance
with the system documentation and relevant Standards.
NOTES:
1 An example of a commissioning test report is shown in Appendix E.
2 Reference should be made to the emergency management plan for commissioning of the
system.
6.2 SPECIFIC SOUND SYSTEM CHECKS
The following specific checks shall be carried out:
(a) Audible signals Check that alert, evacuation and voice message signals are
distributed throughout the building in accordance with Clauses 4.3.4, 4.3.5 and 4.3.6.
(b) Visual and tactile signals Check that visual signals and tactile signals, where used,
comply with Clause 4.3.7.
(c) Automatic operation
(i) If the system is connected to a detection system, simulate an alarm for each
zone on the detection system indicator panel unless only a common alarm is
used. An alarm signal indication shall appear at the sound system panels and
the warning signals shall be transmitted to designated evacuation zones.
(ii) Actuate separately each emergency call point that is connected to the sound
system. An alarm signal indication shall appear at the sound system panels and
the warning signals shall be transmitted to designated evacuation zones.
(iii) Check the operation of the automatic evacuation sequence, where provided.
(d) Installation Check that the installation requirements comply with Section 4.
(e) Circuit supervision Check that the supervision of all signal lines operates in
compliance with Table 4.2.
(f) Battery voltage Allow the system to operate, in the quiescent state, for a period of
not less than 24 h. At the end of this period measure the temperature of the battery
space. Check that the battery voltage corresponds to that specified by the battery
manufacturer for that temperature.
(g) Speaker lines Check the audio impedance of each speaker line to determine that
(i) the permitted load on the amplifier is not exceeded; and
(ii) the sum of all the loads does not exceed that for which the stand-by batteries
were sized.
(h) Fault supervision Check that any fault is annunciated at the fire CIE.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 26
Standards Australia www.standards.com.au
26
6.3 SPECIFIC INTERCOM SYSTEM CHECKS
The following specific checks shall be carried out:
(a) Intercom system
(i) Check that the interconnection between intercom panels is operational.
(ii) Check all handset volumes and signal-to-noise ratios for compliance with this
Standard.
(iii) Check that the system is capable of simultaneously communicating with a
number of WIPs, as specified.
(iv) Check that the all-call address is as specified.
(b) Installation Check that the installation requirements comply with Section 5.
(c) Circuit supervision Check that the supervision of all signal lines operate in
compliance with Table 5.2.
(d) Battery voltage Allow the system to operate, in the quiescent state, for a period of
not less than 24 h. At the end of this period measure the temperature of the battery
space. Check that the battery voltage corresponds to that specified by the battery
manufacturer for that temperature.
6.4 DOCUMENTATION
6.4.1 General
The following documentation shall be provided upon completion of commissioning tests:
(a) As-installed drawings covering the whole system.
(b) Documentation, as required by AS 4428.4 or AS 60849, as appropriate.
(c) Log in accordance with Clause 6.4.2.
6.4.2 Log
The log, which may be an electronic form of record keeping, shall have provisions for
entering the following information:
(a) Identification of the building.
(b) Description of the system components and their location.
(c) All commissioning data to serve as a basis for future service and including the
following:
(i) Type, quantity and 20 h discharge capacity of batteries required.
(ii) Date of battery installation and manufacturers recommended replacement
dates.
(iii) Manufacturers recommended float voltage at normal ambient temperature and
the voltage correction for other temperatures.
(iv) Quiescent current of the sound system and intercom system, ancillary loads and
that of any other CIE connected.
(v) Full load current of the sound system and intercom system, ancillary loads and
that of any other CIE connected.
(vi) The minimum operating voltage of all CIE connected.
(vii) The battery discharge capacity correction factor at full load as determined in
Clause 3.5(c). Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
27 AS 1670.42004
www.standards.com.au Standards Australia
(viii) Minimum battery capacity as calculated in Clause 3.5(d).
(ix) Minimum charging current as calculated in Clause 3.6.
(x) The main power source rating.
(xi) STI reading for each evacuation zone.
(d) Date of commissioning.
(e) A facility for recording the results of maintenance routines as specified in AS 1851.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 28
Standards Australia www.standards.com.au
28
APPENDIX A
MEASUREMENT OF SPEECH INTELLIGIBILITY
(Normative)
A1 CHOICE OF MEASUREMENT
The intelligibility of speech shall be measured, and the requirements for reliable results
shall be satisfied. The results shall then be converted to the CIS according to the relevant
curve(s) given in Figure A1.
NOTE: One of the methods listed in Appendix B should be used.
A2 STATUS OF THE SOUND SYSTEM
Usually, the whole evacuation zone should be in operation for all measurements. If
measurements are carried out with the evacuation zone in a special status, this shall be
stated with the results.
A3 NUMBER OF MEASUREMENTS AND CALCULATION OF THE RESULT
The measurements shall be made at a sufficient number (n) of representative points, which
shall be detailed in the system specification, in each area of coverage. The arithmetical
average (Iav) of the intelligibility values on the CIS, and the standard deviation () of the
results, shall be calculated. The quantity Iav shall exceed the limit value specified in
Clause 4.3.6.
If the result is within of the limit, the measurements shall be repeated, preferably at a
larger number of points.
The mean value of intelligibility, and its 95% confidence interval, over the whole area of
coverage shall be calculated, taking into account the shape of the statistical distribution of
the results of the measurements.
A4 SOUND PRESSURE LEVEL (SPL)
The C-weighted SPL for the measurement shall be equal to the LCeq measured for not less
than 16 s at the measuring point when the system is in normal operation as an emergency
sound system.
NOTES:
1 If the RASTI method is used, A-weighting may be used for both measurements instead of
C-weighting.
2 Linear response may be used instead of C-weighting, only if the results are reliable.
A5 AMBIENT NOISE LEVEL
The A-weighted ambient noise level (the residual noise level) in the absence of the test
signal (the residual noise) shall be measured, in decibels re 20 Pa, over a period sufficient
to reasonably represent the residual noise at the time of the intelligibility test.
Measurements of the equivalent A-weighted SPL shall be made at representative points
over the area of coverage. The positions, duration and time of measurements shall be
reported, together with a note of any unusual circumstances which might affect the validity
of the measurements.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
29 AS 1670.42004
www.standards.com.au Standards Australia
FIGURE A1 CONVERSION OF EXISTING INTELLIGIBILITY SCALES TO
THE COMMON INTELLIGIBILITY SCALE
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 30
Standards Australia www.standards.com.au
30
APPENDIX B
METHODS OF MEASURING SPEECH INTELLIGIBILITY
(Informative)
B1 GENERAL
A number of methods of measuring speech intelligibility have been proposed, and several
are mentioned in National and International Standards. Work on this subject is continuing.
Pending completion of this work, the examples of the available methods herein provide
information on the correlation between them, and their limitations, either directly or by
reference to relevant Standards. This Appendix provides the procedures that should be used.
It is recommended to choose, if possible, the method of measurement that gives the greatest
discrimination in the range of intelligibility being investigated, taking into account the
standard deviation to be achieved and the gradients of the relative curves. For example, STI
has the greatest discrimination at high values of intelligibility, while a 256 word
phonetically balances word score has the greatest discrimination at low values.
B2 METHODS OF MEASUREMENT
B2.1 Speech transmission index (STI)
The STI is derived by calculation from measurements of the modulation transfer function
(MTF), and a number of computer-based measuring systems offer this facility. However,
the details of the carriers and modulation frequencies to be used, and the weights given to
them in the calculations, have not as yet been standardized.
NOTE: Weighting values that are intended to be used, unless there is a reason to the contrary, are
given in IEC 60268-16:1998.
B2.2 Rapid (or room) acoustics speech transmission index (RASTI)
The RASTI results from a simplified method of determining the STI, using two octave-band
noise carriers and four or five modulation frequencies.
NOTE: A description of this method is given in IEC 60268-16.
B2.3 Phonetically balance (PB) word scores
The PB word score method depends on the transmission of specially chosen words, selected
from a known population, to a panel of listeners.
NOTES:
1 General information is given in ISO/TR 4870.
2 For all types of subjective test involving room acoustics, the test words should be embedded
in carrier phrases as this produces representative reflections and reverberation during the
presentation of the test words.
B2.4 Modified rhyme test (MRT)
The MRT method also uses a panel of listeners.
B2.5 Articulation index (AI)
The AI is determined by measuring the sound pressure levels of the wanted speed signals
and the ambient noise. It is calculated after making corrections for masking, frequency and
amplitude distortion of the speech signal, reverberation and the presence of visual clues.
NOTE: Additional information is given in ANSI S3.5.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
31 AS 1670.42004
www.standards.com.au Standards Australia
B2.6 Articulated loss of consonants
The articulated loss of consonants, usually expressed as a percentage with the symbol
%ALcons can be determined from the results of transmission tests, using specially chosen
simple words.
NOTES:
1 Further information can be obtained from Peutz, V.M.A, Articulation loss of consonants as a
criterion from speech transmission in a room, J. Aud.Eng.Soc. 19, 12 (Dec. 1971).
2 ALcons does not use test words in carrier phrases and omits vowels. This leads to erroneous
results in the presence of reverberation or peak clipping.
B3 LIMITATIONS OF THE METHODS
B3.1 General
All the foregoing methods can give misleading results unless the measurement procedure is
carried out very carefully and is strict accordance with the relative Standard. Furthermore,
it is essential that the ambient noise level at the time of measurement is very similar to that
which occurs under normal operating conditions, or an appropriate correction is made to the
raw data of the test results.
NOTE: General information on intelligibility testing is given in ISO/TR 4870.
B3.2 Speech transmission index (STI)
Generally, STI methods are not suitable for testing systems introducing frequency shifts or
frequency multiplication or using vocoders.
With some measuring versions (see IEC 60268-16) the results are meaningful only if
(a) the system does not use any amplitude compression, expansion or non-stationary
temporal processing; and
(b) the total harmonic distortion of a sinusoidal signal giving the same sound pressure
level at the measuring position as the STI test signal does not exceed 17%
(corresponding to approximately 1 dB of compression of a pink-noise signal due to
peak clipping).
B3.3 RASTI
The results are meaningful only if the requirements given in IEC 60268-16 are satisfied. In
general, RASTI is suitable for room acoustics with direct sound transmission between
speaker and listener. Only in specific conditions (i.e., substantially linear systems) can the
method be applied to sound systems.
B3.4 Phonetically balanced (PB) word scores (256 and 1009 population)
The limitations of this method are given in ISO/TR 4870. It should be noted that, because
the method is based on the reception of words by listeners, there are not limitations in
respect of the characteristics of the sound system or those of the environment.
B3.5 Articulation index
The limitations applying to this method are given in ANSI S 3.5.
B3.6 Articulation loss of consonants
The limitations of this method are given in ISO/TR 4870. It should be noted that, because
the method is based on the reception of words by listeners, there are not limitations in
respect of the characteristics of the sound system or those of the environment. If, however,
another method of measurement is used, there may be limitations in these respects.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 32
Standards Australia www.standards.com.au
32
B4 CORRELATION OF THE RESULTS OF THE VARIOUS METHODS
In order to specify a single figure for the intelligibility requirements of a system, and to
compare results of different measurements, much work has been done to determine
relationships between the results of the various methods of measurement. In most cases,
these relationships are now firmly established and accepted, despite being subject to a
degree of uncertainty or statistical variation. For the purposes of the present Standard, it has
been found necessary to correlate the results of each of the foregoing methods to a new
scale, termed the common intelligibility scale (CIS). An essential requirement, due to the
aforementioned uncertainty, is that the gradient of each correlation curve is neither too
small nor too great, as each of these conditions exaggerates the uncertainty in the
correlation.
The correlations that have been determined are given in Figure A1.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
33 AS 1670.42004
www.standards.com.au Standards Australia
APPENDIX C
WIRING SYSTEMS RATING
(Normative)
C1 PROTECTION AGAINST EXPOSURE TO FIRE
All wiring systems required to have protection against fire shall have a rating of not less
than 120 min. This rating is represented as WS5X.
C2 PROTECTION AGAINST MECHANICAL DAMAGE
C2.1 General
Protection against mechanical damage shall be provided in accordance with
Paragraphs C2.2 to 2.7, as applicable. The areas indicated should not be considered as a
rigid list to be adhered to with no deviations, rather they should be considered as a guide to
the types of areas and causes of damage to be encountered. Details of ways to achieve the
grade of protection can be found in AS 3013.
C2.2 WS5X
Areas where physical damage is considered to be unlikely. Examples of these areas are
(a) masonry riser shafts with strictly limited access;
(b) non-trafficable ceiling void areas; non-trafficable ceiling void areas;
(c) inaccessible underfloor areas;
(d) underground installation in accordance with AS/NZS 3000; and
(e) internal domestic and office situations where cabling is mounted on walls at heights
above 1.5 m.
C2.3 WS51
Areas where physical damage by light impact is considered possible. Examples of these
areas are
(a) internal domestic or office situations where cable is mounted on walls at heights
below 1.5 m; and
(b) trafficable ceiling void areas where access to building services for maintenance
purposes is required.
C2.4 WS52
Areas where physical damage by impact from manually propelled vehicle is possible.
Examples of these areas are
(a) passageways and storerooms in domestic, office and commercial locations where
hand trucks and barrows may be used, and cables are mounted at a height of less than
1.5 m;
(b) plant rooms where only minor equipment is installed; and
(c) workshops where repair and maintenance, on small equipment and furniture or the
like, is carried out, and cables are mounted at a height of less than 2.0 m.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 34
Standards Australia www.standards.com.au
34
C2.5 WS53
Areas where physical damage by impact from light vehicles is possible. Examples of these
areas are
(a) car parks and driveways where cars and other light vehicles are present and cables are
mounted at a height of less than 2.0 m; and
(b) storage areas where manually operated devices such as pallet trucks may be operated
and cables are mounted at a height of less than 2.5 m.
C2.6 WS54
Areas where physical impact from vehicles with rigid frames or rigid objects, the weight of
which does not exceed 2.0 t, is possible. Examples of these areas are
(a) small delivery docks where the cabling is mounted below a height of 3.0 m;
(b) warehouses with pallet storage up to 3.0 m and use of forklift trucks; and
(c) heavy vehicle workshops.
C2.7 WS55
Areas where physical damage from impact by laden vehicles or objects the laden weight of
which exceeds 2.0 t. Examples of these areas are
(a) loading and delivery docks;
(b) fabrication and maintenance areas for medium to heavy engineering; and
(c) large high pile storage warehouses with forklift trucks.
Where any WS cabling traverses areas of various protection requirement, and it is neither
viable nor practicable to change the degree of protection at the transition points, the
installed cabling shall comply with the highest requirement of protection.
C3 PROTECTION AGAINST HOSING WITH WATER
Where the wiring system is required to maintain its integrity after exposure to fire and
subsequent hosing with water, it shall have the suffix W appended to its rating,
i.e., WS5XW.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
35 AS 1670.42004
www.standards.com.au Standards Australia
APPENDIX D
(Informative)
STANDARD FORM OF INSTALLERS STATEMENT FOR SOUND SYSTEM AND INTERCOM SYSTEM
1 Name of premises ......................................................................................................
2 Situated at .................................................................................................................
..................................................................................................................................
..................................................................................................................................
3 I/We have installed in the above premises
an alteration to the system of* ..........................................................................
a system of*.....................................................................................................
(Brand name)
4 The system incorporates ...........................................................................................
.................................................................................................................................
...................................... ancillary equipment
CIE location ..............................................................................................................
5 The quiescent load of ancillary equipment is .............................................................
6 Primary power voltage and source .............................................................................
7 Secondary battery type and capacity .........................................................................
8 System maintenance agreement details .....................................................................
9 Portion/s of premises not served by this system ........................................................
.................................................................................................................................
I/We hereby certify that:
a The installation is complete and has been thoroughly tested.
b The system is installed in accordance with the current requirements of
AS 1670.4*.
c The system is installed in accordance with attached design specification*.
Except in regard to the following details*....................................................................
.................................................................................................................................
.................................................................................................................................
Which have been approved by ...................................................................... (person)
of......................................................................................................... (organization)
*Strike out the words that are not applicable.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
36 AS 1670.42004
Standards Australia www.standards.com.au
So
un
d p
res
su
re
lev
el
Ev
ac
ua
tio
n
zo
ne
Co
rre
sp
on
din
g
fire
zo
ne
s
Min
. M
ax
.
ST
I
Re
ad
ing
Nu
mb
er
of
vis
ua
l w
arn
ing
de
vic
es
Nu
mb
er
of
em
erg
en
cy c
all
po
ints
W
IP l
oc
ati
on
Au
ral
Ca
ll
Sig
na
l le
ve
l
(dB
A)
Fa
ult
sig
na
l
at
fire
CIE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
37 AS 1670.42004
www.standards.com.au Standards Australia
APPENDIX E
COMMISSIONING TEST REPORT
(Normative)
THE SOUND SYSTEM AND INTERCOM SYSTEM IS INSTALLED AT:
(Premises) ...................................................................................................................
...................................................................................................................
...................................................................................................................
Postcode ....................................................
Owner or Owners Authorized Agent........................................................................................
..............................................................................................................................................
..............................................................................................................................................
Postcode .....................................................
* NEW
* MODIFICATION TO SYSTEM
* ADDITION TO
(* Cross out those not applicable)
Date of commissioning tests ...................................................................................................
Name and address of commissioning company, company stamp, or company name in BLOCK LETTERS ..............................................................................................................................
..............................................................................................................................................
..............................................................................................................................................
..............................................................................................................................................
Postcode .....................................................
Commissioning person
Name (print) .............................................................................
Signature ..................................................................................
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 38
Standards Australia www.standards.com.au
INSTRUCTIONS:
This form is to be used in conjunction with
(a) operators manual;
(b) installers statement(s); and
(c) as-installed drawings,
to provide a complete description of the installed system and its tested performance at the time of its commissioning into service.
SYSTEM INFORMATION
GENERAL YES
(a) All system equipment is located and installed in accordance with the as installed drawings.
(b) The evacuation zone facilities have been correctly labelled and that the evacuation zone is immediately apparent from the labelling.
(c) All loudspeakers are of the type specified.
(d) The total zone rating does not exceed amplifier capacity.
(e) The WIP locations have been correctly labelled and the emergency zones are immediately apparent from the labelling.
(f) All WIPs are of the type specified.
WIRING
(a) The a.c. primary power source for the system has been provided in accordance with the requirements of AS/NZS 3000 and Section 4 of AS 1670.4.
(b) The system wiring complies with the requirements of Clause 2.3 of AS 1670.4.
(c) A fault signal is displayed at the intercom panel when the circuit wiring at the last emergency call point on each zone is open-circuited.
POWER SUPPLY
(a) The power supply unit functions in accordance with the requirements of Section 3 of AS 1670.4.
(b) The installed battery has sufficient capacity to operate the system. Calculations as per Clause 3.5 of AS 1670.4 are attached.
(c) Record the following:
(i) Mains supply voltage .....................................................................
(ii) Float charge voltage ......................................................................
(iii) Full load current of system.............................................................
(iv) Quiescent current of system ..........................................................
(v) Rated output current of battery charger ..........................................
(vi) Battery type and capacity ..............................................................
(vii) Battery manufactured date.............................................................
(viii) Recommended battery replacement due date.................................
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
39 AS 1670.42004
www.standards.com.au Standards Australia
DOCUMENTATION
(a) The operators instructions have been provided.
(b) The as installed drawings have been provided and they correctly represent the installation.
(c) The logbook/log has been provided.
OPERATIONAL TESTS
(a) A fault signal is displayed at the sound system panel when the circuit wiring at the last speaker on each zone is open-circuited.
(b) A fault signal is displayed at the sound system panel when the circuit wiring at the last speaker on each zone is short-circuited.
(c) Each speaker operates in accordance with the requirements of Section 4 of AS 1670.4.
(d) Alert, evacuation and voice message signals are distributed throughout the building in accordance with Clause 4.3.4, 4.3.5 and 4.3.6 of AS 1670.4.
(e) Visual warning devices, where used, comply with Clause 4.3.7 of AS 1670.4.
(f) Automatic operation.
(i) If the system is connected to a fire detection system, a fire alarm for each zone on the FIP, correctly initiates the appropriate sound system zone.
(ii) Each emergency call point that is connected to the sound system initiates an alert signal indication at the sound system panel and the alert signal is transmitted to designated evacuation zones.
(iii) The alert signal changes to an evacuation signal in the specified time.
(iv) The operation of the automatic evacuation sequence, where provided, operates as specified.
(g) The environmental conditions in which the equipment is installed permit satisfactory use of the system in accordance with Clause 2.1 of AS 1670.4.
(h) A fault signal is displayed at the intercom panel when the circuit wiring at each WIP is open-circuited.
(i) A fault signal is displayed at the intercom panel when the circuit wiring at each WIP is short-circuited.
(j) Each WIP operates.
(k) The aural call signal at each WIP complies with Clause 5.3.7 of AS 1670.4.
RECORDING RESULTS
The results of operational test in each emergency zone are attached to this report and recorded in the log.
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
AS 1670.42004 40
NOTES
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
Standards Australia
Standards Australia is an independent company, limited by guarantee, which prepares and publishes
most of the voluntary technical and commercial standards used in Australia. These standards are
developed through an open process of consultation and consensus, in which all interested parties are
invited to participate. Through a Memorandum of Understanding with the Commonwealth government,
Standards Australia is recognized as Australias peak national standards body. For further information
on Standards Australia visit us at
www.standards.org.au
Australian Standards
Australian Standards are prepared by committees of experts from industry, governments, consumers
and other relevant sectors. The requirements or recommendations contained in published Standards are
a consensus of the views of representative interests and also take account of comments received from
other sources. They reflect the latest scientific and industry experience. Australian Standards are kept
under continuous review after publication and are updated regularly to take account of changing
technology.
International Involvement
Standards Australia is responsible for ensuring that the Australian viewpoint is considered in the
formulation of international Standards and that the latest international experience is incorporated in
national Standards. This role is vital in assisting local industry to compete in international markets.
Standards Australia represents Australia at both ISO (The International Organization
for Standardization) and the International Electrotechnical Commission (IEC).
Electronic Standards
All Australian Standards are available in electronic editions, either downloaded individually from our web
site, or via On-Line and DVD subscription services. For more information phone 1300 65 46 46 or visit
Standards Web Shop at
www.standards.com.au
Acce
ssed
by
AURE
CON
PTY
LTD
on 2
4 M
ay 2
012
-
GPO Box 5420 Sydney NSW 2001
Administration Phone (02) 8206 6000 Fax (02) 8206 6001 Email [email protected]
Customer Service Phone 1300 65 46 46 Fax 1300 65 49 49 Email [email protected]
Int