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
Main methods
- Piezoceramic sensors (disc – basic, cylinder and other shapes - advanced)
- Electret microphone in mineral oil (example)
- Water proof speaker used as underwater transducer