| 摘要 |
PURPOSE:To obtain a broad band electroacoustic transducer by arranging plural piezoelectric elements with different basic resonance frequency as the drive for same diaphragm so as to make the characteristic flat. CONSTITUTION:Piezoelectric element 2A, 2B are arranged in one and same plane of the flat diaphragm 1. The element 2A is used for a low resonance frequency and the element 2B is used for a high resonance frequency. Then the characteristic peak by the plural elements 2A, 2B with different basic resonance frequency is make flat by the diaphragm 1. Thus, the electroacoustic transducer with a broad band is obtained.
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