| 发明名称 |
Electroacoustic transducer, manufacturing method thereof, and electronic device utilizing same |
| 摘要 |
An electroacoustic transducer comprises a piezoelectric vibrator; a casing being provided with a predetermined space from the piezoelectric vibrator and including a frustum shape cutout in an inner wall thereof; and an acoustic absorption material being fitted in the cutout wherein a sound hole is formed in the casing in front of the piezoelectric vibrator in an oscillating direction of the piezoelectric vibrator; and the casing is formed in the casing such that a hole diameter of a sound path decreases toward a front end in the oscillating direction of the piezoelectric vibrator. |
| 申请公布号 |
US9338556(B2) |
申请公布日期 |
2016.05.10 |
| 申请号 |
US201314434174 |
申请日期 |
2013.10.11 |
| 申请人 |
NEC CORPORATION |
发明人 |
Onishi Yasuharu |
| 分类号 |
H04R25/00;H04R17/00;H04R31/00;H04R1/40 |
主分类号 |
H04R25/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An electroacoustic transducer, comprising:
a piezoelectric vibrator; a casing being provided with a predetermined space from the piezoelectric vibrator and including a frustum shape cutout in an inner wall thereof; and an acoustic absorption material being fitted in the cutout; wherein a sound hole is formed in the casing in front of the piezoelectric vibrator in an oscillating direction of the piezoelectric vibrator; and the casing is formed in the casing such that a hole diameter of a sound path decreases toward a front end in the oscillating direction of the piezoelectric vibrator. |
| 地址 |
Tokyo JP |
