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Instrument: Hydrophone
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Description
A hydrophone is a microphone designed to be used underwater for recording or listening to underwater sound. Most hydrophones are based on a piezoelectric transducer that generates electricity when subjected to a pressure change.
A single SoundTrap 300 hydrophone was mounted on a stainless steel stand vertically about 1 meter above the rocky bottom with . The hydrophone was set to record continuously at 98 hz.
For instrument specs see: http://www.oceaninstruments.co.nz/product/soundtrap-300-std