| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an oscillation device capable of reproducing a large volume of sound though being compact in size, reducing a manufacturing man-hour, stabilizing a characteristic variation, and improving reliability. <P>SOLUTION: An oscillation device 100 reproduces a large volume of sound though being a compact in size by using equipment for an ultrasonic wave as a vibrator in consideration of the influence on miniaturization of a piezoelectric element 110. Since having a high electromechanical quality factor Q, the piezoelectric element 110 is dominant in the reproduction of the sonic wave restricted to a specified frequency band to thereby highly efficiently reproduce sound. <P>COPYRIGHT: (C)2012,JPO&INPIT |
