Hydrophone low frequency and sonar antenna comprising such hydrophones.

摘要

The hydrophone low frequency for sonar antenna comprises at least one ceramic thinned (10) to open porosity saturated with a viscous fluid, on which have been deposited metallic electrodes (13). This hydrophone form a type of filter passes - above, the low cut-off frequency is adjusted by modifying the surface of the electrodes. & br / the invention applies, in particular, to the towed linear antennas, and the passive sonars.