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TESTING IN SILENCE
Turn-key noise control solutions for testing
Anechoic chambers for scientific research
Acoustic test cells
Dyno test cells
TESTING IN SILENCE
Testing in silence is important for people and the environment, and to be able to perform reliable sound measurements. Merford Noise Control supplies customised acoustic test cells, dyno test cells and anechoic chambers. We take care of the entire process in-house, from design and engineering to production and assembly. We reduce sound to an acceptable level, also taking into account requirements and wishes in the field of ventilation, access, maintenance and (fire) safety. In addition, we provide firm guarantees for sound insulation, giving you absolute assurance the solution satisfies your requirements.
OPTIMUM SOUND REDUCTIONOur acoustic test rooms ensure that a noisy source within the
room is reduced to a low sound level outside, or vice versa. In
the latter case sound coming from outside is reduced, creating
an acceptable sound level inside the room. Our solutions are
built up around robust, self-supporting panels as a modular
system, either with or without components such as doors,
windows, silencers or ducting. This allows for easy disassembly
and re-assembly on a different location.
Optimum sound reduction can be achieved with many dif-
ferent combinations. Single-wall systems are available, but
also box-in-box systems for very high sound reduction require-
ments. Depending on the clients wishes, the Rw insulation
values vary between 34 dB and 52 dB according to ISO717-1982
and DIN 52.21001984. Absorption coefficients may vary between 0.75 and 1.00 according to ISO/FDIS 11654:1996.
COMBINATION OF ACOUSTICS AND SILENT VENTILATIONPractically all Merford solutions are fitted with a ventilation
system to remove the heat generated inside and to supply air
from the outside. We determine the required ventilation flow
based on your wishes and the application concerned, depend-
ing on, for example, the heat radiated by the test object. The
ventilation system is fitted with heavy-duty acoustic silencers
on both the air supply and exhaust, to achieve at least the same
insulation values as the acoustic values used. Our splitters
have a very favourable design for air flow, creating a low back
pressure. This results in a huge reduction in the energy required
for the ventilation system. The splitters in the silencers are
highly robust and can be cleaned. We use energy-efficient,
adjustable fans with state-of-the-art technology.
We can also install ducting, roof ducts and rain hoods. For
optimum ventilation flow in the right location we can add
diffusers, valves and ducting to the solution. If required, the
acoustic ventilation system can be used for air-resistance
simulations at high velocities, with flows of 200,000 m3/h
SILENT CONTROL ROOM / OPERATOR ROOMFor your staff, a safe and comfortable work environment is
of great importance. A Merford control room or operator
room protects your engineers from noise and other pos-
sible hazardous effects (heat, exhaust gases, etc.) during
testing. A pleasant sound level makes it easier for them to
concentrate and therefore increases productivity. The acoustic
environment in the control room and the desired finishing
can be selected in accordance with your requirements. Every
control room is fitted with sufficient shatterproof glass and
ventilation. Cable and pipe ducts are acoustically sealed in a
ANECHOIC CHAMBERS AND SILENT ROOMSIn anechoic chambers and silent rooms, reflections must be
minimised for acoustic measurements in anechoic rooms.
The cut-off frequency in the room and the dimensions deter-
mine the choice of sound-absorbing material. This may vary
from flat sound-absorbing material to cone-shaped material.
Existing structural rooms can also be converted. Apart from
the need to achieve a high sound-insulation value, one im-
portant issue is reducing impact noise via the foundations
and building structures.
Merford Noise ControlPO Box 160, 4200 AD GorinchemFranklinweg 8, 4207 HZ GorinchemThe Netherlands
tel +31 (0)183 675 email@example.com