Translations:Dictionary:Hydrophone/1/en
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{{#category_index:H|hydrophone}} A detector that is sensitive to variations in pressure, as opposed to a geophone that is sensitive to particle motion. Used when the detector can be placed below a few feet of water, as in marine or marsh work or as a well seismometer.
Some hydrophones operate because of magnetostriction (q.v.) but most are piezoelectric (q.v.). Piezoelectric hydrophones include benders, disc hydrophones, and cylindrical hydrophones.