Hydrophone instrument

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.

1. What is a hydrophone used for?
2. What is measured when using a hydrophone?
3. How far can a hydrophone detect sound?
4. Who uses underwater hydrophone?

What is a hydrophone used for?

A hydrophone is an underwater device that detects and records ocean sounds from all directions. People often think that the underwater world is silent. In fact, numerous marine organisms use sound for communication, reproduction, and to seek prey.

What is measured when using a hydrophone?

Hydrophones are designed to measure the mechanical sound pressure in water. Most hydrophone sensors are piezoelectric materials which convert mechanical energy to electrical energy.

How far can a hydrophone detect sound?

Using an underwater microphone called a hydrophone, a second boat stationed 900 miles away successfully detected the sounds. Subsequent tests picked up the signal at a distance of 3,000 miles.

Who uses underwater hydrophone?

Submarines also use hydrophones to track the position of an incoming, underwater remotely operated vehicle (ROV) to avoid collisions. The hydrophone is placed on top of a submarine, facing down at a 25 to 30-degree angle to allow for accurate tracking of sound.