ELECTROACOUSTIC TRANSDUCER Russian patent published in 1995 - IPC

FIELD: telephone sets. SUBSTANCE: electroacoustic transducer has case accommodating cylinder of acoustically soft flexible material whose loose end carries round metal strip with piezoceramic disk attached to it and having diameter equal to that of at least three stops joined with case and placed equidistantly over periphery of round metal strip, on its outer side. Piezoceramic disk diameter is smaller than that of round metal strip. The latter is installed for engagement with stops and has diameter D. Inner diameter of cylinder made of acoustic flexible material is 0.6-0.8 of D and its height is at least 0.2 of D. EFFECT: improved sensitivity. 1 dwg