DIY hydrophones
Construction and Testing of Low Noise Hydrophones
by Miguel Alvarado Juarez
A guide to constructing hydrophones and hydrophone arrays for monitoring marine mammal vocalizations
by Jay Barlow, Shannon Rankin and Steve Dawson
A cheap sensitive hydrophone for monitoring cetacean vocalisations
by ?
Electret microphone in mineral oil
Main methods
Piezoceramic sensors (disc – basic, cylinder and other shapes - advanced)
Electret microphone in mineral oil (
example
)
Water proof speaker used as underwater transducer