1. n. [Geophysics]

A device designed for use in detecting seismic energy in the form of pressure changes under water during marine seismic acquisition. Hydrophones are combined to form streamers that are towed by seismic vessels or deployed in a borehole. Geophones, unlike hydrophones, detect motion rather than pressure.

See related terms: acoustic positioning,  acquisition,  array,  cable,  detector,  eel,  four-component seismic data,  geophone,  ocean-bottom cable,  receiver,  seismometer,  streamer,  three-component seismic data