BROADBAND HYDROACOUSTIC PIEZOELECTRIC TRANSDUCER Russian patent published in 2019 - IPC H04R17/00 

FIELD: acoustics.

SUBSTANCE: invention relates to acoustics, particularly to piezoelectric transducers. Broadband hydroacoustic piezoelectric transducer comprises an active element in the form of a vertical set of piezoelectric sections, flexible passive gaskets and two sets of piezoelectric washers made from piezo polymer film, a front and back straps, a tightening bolt with a nut, a housing, a sealing ring. Body connection with frontal conical pad is flexible. All piezoceramic washers, piezoelectric washers from piezopolymer film of the first and second sets are connected in parallel. Piezoceramic washers are connected through a matching link to output of power amplifier. All piezoelectric washers of the first type are connected to inductance L₂, forming with reservoir C_n2 piezoelectric washers circuit, all piezoelectric washers from the second set are connected through a matching link to the input of the receiver. Between the electrical output of the set of piezoceramic washers and the electrical output of the first set of piezoelectric washers, a tunable inductance L₄, generating with parasitic capacitance C₄ filter-plug. Between electric outputs of sets of piezoelectric washers there connected is tunable inductance L₅, generating with parasitic capacitance C₅ filter-plug.

EFFECT: expansion of frequency band, reduction of dead zone.

1 cl, 3 dwg