monitoring underwater sound at the seattle aquarium research proposal discussion wednesday, july 19,...
TRANSCRIPT
Monitoring underwater sound at the Seattle Aquarium
Research proposal discussionWednesday, July 19, 2006
Scott Veirs | [email protected] | (206) 251-5554
Goals for this meeting+
• Discuss logistics of deploying a hydrophone system at the Seattle Aquarium
• Continue considering potential educational benefits (and funding opportunities)
• Monitor and study ambient noise and biological (endangered orca) sound
Outline• Puget Sound hydrophone network overview
– History, precedents, and progress– Proposed nodes and funding status– Research results to date
• The proposed Aquarium node– Components and constraints– Installation and maintenance
• Potential educational benefits– Listening/learning station (pier end, Great Hall)?– Puget Soundscape concept
Building a hydrophone network in the Pacific
Northwest
Extant and proposed nodes in Haro Strait
Collaboration with Val Veirs
(Colorado College/Orcasound with TWM/SeaSound)
4+ phones, ~30m offshore, ~10m depth
Calibrated to measure sound pressure levels
5+ year lifetimes18+ months (4/04-
11/05)results
Orcasound
HaroStrait
SanJuanIsland
Victoria
Lime Kiln
Other precedents(and potential nodes)
• OrcaLab, Hanson Island, BC (Paul Spong)• Race Rocks, southern Vancouver Island, BC• Vashon Hydrophone project, west side Vashon
Island (Ann Stateler and Joe Olson)• Buoyed systems for Humpbacks
– Whalesong Project, Hawai’i– Jupiter Foundation, Hawai’I and Alaska
Proposed new nodes in Puget Sound and funding status
• Seattle Aquarium• Port Townsend Marine Science Center
• $25,000 from NOAA for initial implementation• Exploring funding from WDFW• Prospecting for streaming sponsor
Proven monitoring system
Hydrophones: ITC-4066
Bandwidth: 100Hz – 15kHz
Digitizing rate: 44,100 sec-1
Averaging time: 2 seconds
Reporting interval: 30 minutes
• Monitors continuously
• Detects and records automatically
• Computes statistical summaries
• Localizes sound sources
24 hrs
24 hours of ambient sound in Haro Strait
Seal?
??
Orcas
Ferry
Winter ambient sound Jan 11 – Jan 13, 2005
~ 20 Large Commercial Ships Pass Each Day
dB
1/11
1/12
1/13
8 am 8 pm 8 am
Day Night
100
120
100
120
100
120
date
8 am 8 pm 8 am
Day Night
7/3
7/4
7/5
7/6
Commercial ships dominate at nightRecreational boats dominate during day
Jul 03 – Jul 06, 2004
Summer ambient sound
100
120dB
100
120
100
120
100
120
date
114
114.5
115
115.5
116
116.5
117
117.5
118
June July Aug Sept Oct Nov Dec Jan Feb Mar April May June July Aug Sept Oct Nov
dB re 1
μ (0.1-15 ) Pa kHz
Monthly pattern of ambient noiseJune 2004 – November 2005
112
113
114
115
116
117
118
119
120
121
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Hour in Day
dB re 1
μ (0.1-20 )Pa kHz
Not Summer
Summer
Diurnal pattern of ambient noiseNon-summer is October-April | Summer is July-August
Conclusions about ambient noisein Haro Strait
• Overall SPL: minimum~95dB; average ~115dB.
• Typical maximum SPL~130dB; maximum~144.
• Ships are dominant source during winters and during summer nights (raising average ~20dB above minimum).
• Boats make significant contribution during summer days (raise average by ~2dB during summer afternoons)
The proposed node at the Seattle Aquarium
USGS
Components and costs
2 hydrophones and cable $500PC computer $1,500installation hardware $200
Hydrophone deployment 8 $100 $800Node installation/configuration 12 $50 $600
Cost per node $3,600
• 2 hydrophones, single cable (+ protectors)
• PC (or laptop), power, Internet access
• Diver for installation (1 hour) and annual maintenance
Sighting and potential benefits
Puget Soundscape concept
Explore via link at http://beamreach.org/051/
