发明名称 |
DIRECTIONAL LOUDSPEAKER |
摘要 |
In a directional loudspeaker, an audible sound signal that is modulated with a carrier wave in the ultrasonic wave band is input to a piezoelectric element, and thereby a diaphragm having the piezoelectric element is vibrated and a sound wave is generated. In such a directional loudspeaker, the diaphragm is fixed to a fixed part via a plurality of beams disposed along the outer circumference of the diaphragm. |
申请公布号 |
EP2760224(B1) |
申请公布日期 |
2017.01.18 |
申请号 |
EP20120833078 |
申请日期 |
2012.08.28 |
申请人 |
Panasonic Intellectual Property Management Co., Ltd. |
发明人 |
KONNO, Fumiyasu;TAKEDA, Katsu |
分类号 |
H04R7/00;H04R1/32;H04R1/40;H04R3/00;H04R7/20;H04R17/00 |
主分类号 |
H04R7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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