the Hydrophone used, design: Loughborough University.Karl Grabe, Cork, Ireland. Home
Sea Sounds and Hydrophones Apr 2008 updated Mar 2022
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Cork Hydrophone Recordings
Recordings (WAV files) of Snapping Shrimp recorded at Hole Open Bay West (near Old Head of Kinsale) on 27 June 2005 N51 36.763 W8 32.673:
These recordings were made with a home made hydrophone (see photos and link below), pre-amp and and analogue cassette recorder. Water dept was 7m, hydrophone depth 5m. About 20m from the shore.
the Hydrophone used, design: Loughborough University.
Loughborough University Underwater Acoustics Research Group: PDF copies: Info on how to build the above DIY hydrophone Hydrophone and suitable preamplifier. (the original University links are now gone)
2022: Instructables DJJules in Circuits "navy" high spec DIY hydrophone
Nauta: Italian company providing hydrophone equipment and useful tips on recording using a hydrophone
Sound of the sea from Rhode Island Office of the Marine: Sample sounds and descriptions of common dolphins, Snapping Shrimp, humpback whale etc (search for them at the website)
T-PODS for recording dolphin and porpoise cliks. Lots of info about echo-location, frequencies etc.
Other home-brew hydrophones tried (but not as good as the one above):
Security alarm sounder, electronics removed and plastic apertures opened - very sensitive but resonances due to large volume of air inside. Tried adding cotton wool as a baffle but still get resonance. Lead weight underneath to counteract buoyancy. The two piezo electric disks already had water proof seals and are wired in parallel.
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Telephone condenser microphone, with built in pre-amp, covered in rubber to keep water out. It shouldn't work that well but it gives good results.
Soothing sounds: 8hour(!) WMA of waves on a beach.
FREE MP3 Ringones: Shandon "Boys of Fairhill", "Home and Away", BennyHill, Green Acres Short, Green Acres Long, Hawaii5-0, Little House on the Prarie