Electroacoustic transducer

摘要

There is provided an electroacoustic transducer, comprising: a diaphragm including a rectangular metal plate provided with a rectangular piezoelectric plate having electrodes at an upper face and a lower face thereof, one of the electrodes being bonded to at least one of the faces of the rectangular metal plate; a support medium including retaining parts for retaining two shorter sides of said diaphragm; the two shorter sides of said diaphragm being fixed to said retaining parts by an adhesive having a Young's modulus after curing between 4.0 × 10 4 N/m 2 and 5.0 × 10 6 N/m 2 , gaps between two longer sides of said diaphragm and said support medium being sealed by an elastic sealant; and said diaphragm being adapted into bending vibration in a longitudinal bending mode by applying a predetermined electrical signal between said metal plate and the opposing electrode provided on said piezoelectric plate. The above described electroacoustic transducer has high sound pressure.