| 摘要 |
PROBLEM TO BE SOLVED: To obtain an piezo-electric electroacoustic transducer which does not easily receive bad effect to sound pressure and resonance characteristic by metallic terminals even when it proceeds to be made small and thin. SOLUTION: An piezo-electric electroacoustic transducer 1 has a piezoelectric diaphragm 2 that comprises piezo-electric device 5 which uses a piezo-electric ceramic plate with >=100μm thickness and is applied onto one plane of a metallic plate 4 with >=100μm thickness in a case 3, and metallic terminals 8 and 9 which are connected to the diaphragm 2 and extended to the outside of the case 3. In such a case, elastic modulus X must be within the range of the expression when Young's modulus of the terminal 8 which is connected to the device 5 is E (N/m<2> ), the width of the part which extends from case inside to case outside is b (mm), thickness is h (mm) and length is 1 (mm). |
