发明名称 |
Ultrasonic transducer and ultrasonic speaker using the same |
摘要 |
An ultrasonic transducer includes: a fixed electrode having corrugations on the surface; a vibrating film having an electrode layer and disposed on the surface of the fixed electrode; and a holding member which holds the fixed electrode and the vibrating film. The ultrasonic transducer is driven by applying an AC signal between the electrode layer of the vibrating film and the fixed electrode, and generates a sound pressure of at least 120 dB within a frequency range from 20 kHz to 120 kHz.
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申请公布号 |
US7881489(B2) |
申请公布日期 |
2011.02.01 |
申请号 |
US20050629248 |
申请日期 |
2005.05.11 |
申请人 |
SEIKO EPSON CORPORATION |
发明人 |
MATSUZAWA KINYA;SEKINO HIROKAZU;FUKUI YOSHIKI;MIYAZAKI SHINICHI |
分类号 |
H04R19/00;H04R25/00;B06B1/02;H04R3/00;H04R19/02 |
主分类号 |
H04R19/00 |
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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