| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an oscillation device which can flatten the frequency characteristics of sound pressure level. <P>SOLUTION: Since the rigidity ratio of a piezoelectric element 132, an elastic member 131, and a vibration film 120 is controlled, an electroacoustic converter 100 can match the impedance for the vibration amplitude. Since a piezoelectric vibrator 130 is bonded to a frame with a resin vibration film 120 having a large internal loss interposed therebetween, mechanical quality factor Q of the electroacoustic converter 100 can be reduced. Consequently, the frequency characteristics of sound pressure level can be flattened. <P>COPYRIGHT: (C)2012,JPO&INPIT |
