Hydrophone (New)

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Item Hydrophone (New) same as Teledyne
Item code
Description Preseis
Manufacturer Sensor
Donor ION/Sensor
Location Houston Geoscience Center
Serial number
Taxonomy S045

This invention describes an acoustic transducer assembly wherein an extremely high figure of merit is obtained as a result of converting incoming acoustic axial stress into radial extensional stress thereby multiplying its effect. The piezoelectric active element is encased in a metal sandwich enclosing two semilunar air spaces which allow the device to withstand extremely high hydrostatic pressure yet still respond to low level sound waves when acting as a hydrophone. The mechanical prestress induced by the differential coefficients of expansion between the metal case and the piezoelectric ceramic element also serves to prevent depolarization aging.