Multiple choice

Hydrophone is an instrument for

  1. measuring sound in wind

  2. measuring sound in humidity

  3. measuring sound underwater

  4. measuring sound on mountain.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A hydrophone is a microphone designed to be used underwater for recording or listening to underwater sound. Unlike microphones that detect air pressure changes, hydrophones detect pressure changes in water. They're used in marine biology, submarine navigation, seismic studies, and underwater acoustics research.

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