| 摘要 |
<p>Disclosed is a piezoelectric speaker (100) which is provided with a substrate (13), a diaphragm (10) including a plurality of piezoelectric devices (11a to 11d) placed on the substrate (13), and a frame (15) for supporting the substrate (13) at the outer peripheral part thereof, wherein the plurality of piezoelectric devices (11a to 11d) include first piezoelectric devices (11a and 11b) and second piezoelectric devices (11c and 11d), the number of layers of which is less than that of the first piezoelectric devices. The second piezoelectric devices (11c and 11d) may be arranged further from the center of the substrate (13) than the first piezoelectric devices (11a and 11b).</p> |
