Underwater acoustic transducer and manufacturing method of back lining sound absorption assembly thereof

• Main Authors: XU GENFU, ZHANG WUTIAN, NI PENGFEI, XU JUN, WENG XIAOLEI, YU GENMING
• Format: Patent
• Language: Chinese; English
• Published: 19.05.2020
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PUBLIC ADDRESS SYSTEMS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

An underwater acoustic transducer comprises a shell, an impedance converter, a piezoelectric ceramic piece, an acoustic resistance matching block, a back lining sound absorption assembly, a watertightadhesive layer and a signal cable passing through the shell and connected to the piezoelectric ceramic piece, wherein the impedance converter, the piezoelectric ceramic piece, the acoustic resistancematching block, the back lining sound absorption assembly and the watertight adhesive layer are located in the shell; one end of the shell is provided with an opening; the impedance converter is arranged in the middle of the shell; the acoustic resistance matching block is arranged at the opening of the shell; the piezoelectric ceramic piece is arranged on the side, facing the impedance converter, of the acoustic resistance matching block; the back lining sound absorption assembly is arranged between the piezoelectric ceramic piece and the impedance converter; and the watertight adhesive layer coats the outside of the