MOLECULAR-ELECTRONIC HYDROPHONE WITH STATIC PRESSURE COMPENSATION Russian patent published in 2020 - IPC H04R1/44 

FIELD: acoustic metrology.

SUBSTANCE: molecular-electronic hydrophone with static pressure compensation contains a molecular-electronic converter rigidly fixed inside a sealed housing, filled with easily compressible liquid and divided into two chambers with a rigid wall with a capillary, such that each of the chambers communicates with one of the membranes of the molecular-electronic converter, wherein the outer chamber of the chambers is separated from the surrounding environment by the impermeable membrane, and the inner chamber is separated from the surrounding environment by the rigid casing of the housing. Chamber separated from the environment by a soft membrane has a much smaller volume than the other chamber. Compressible fluid used is polymethylsiloxane or polydimethyl siloxane fluids of different viscosity. Note here that negative feedback is introduced to stabilize hydrophone parameters.

EFFECT: high accuracy of measurements at large depths due to compensation of external static pressure, which will allow the hydrophone to have the same response regardless of depth.

4 cl, 6 dwg, 1 tbl