| 摘要 |
PROBLEM TO BE SOLVED: To make a piezoelectric film speaker having a desired area wide in band. SOLUTION: In the piezoelectric film speaker consisting of a diaphragm 2 configured by forming an electrode 20 on a flexible piezoelectric film at its opposite surfaces, and a frame 3 for supporting a side of the diaphragm 2, the electrode 20 is divided into divided sites 20A, 20B, 20C. Respective areas have different sizes. The curvatures R1 , R2 , R3 of the flexible piezoelectric film at the respective divided sites 20A, 20B, 20C are formed to different ones.
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