From SEG Wiki
Jump to navigation Jump to search
Other languages:


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.

FIG. H-12. Piezoelectric hydrophones. (a) A piezoelectric disk generates a voltage across opposite faces when bent. (b) Acceleration-canceling feature of the disc hydrophone. (c) Bender geophone. (d) Cylindrical hydrophone.[1]

The sensing element is usually a piezoelectric ceramic material such as barium titanate, lead zirconate, or lead metaniobate. Piezoelectric hydrophones are high-impedance devices and signals may be passed through preamplifiers or impedance-matching transformers before transmission through the streamer to the recording instruments. Compare geophone.


  1. Sheriff, R. E; Geldart, L. P (August 1995). Exploration Seismology, 2nd Ed. Cambridge Univ. Press. p. 224. ISBN 9780521468268.

External links

find literature about
SEG button search.png Datapages button.png GeoScienceWorld button.png OnePetro button.png Schlumberger button.png Google button.png AGI button.png