| 发明名称 |
SOUND GENERATING DEVICE |
| 摘要 |
A piezoelectric sound generator having a diaphragm carrying the piezoelectric element and at least one resonant chamber spaced from said diaphragm with the wall of said chamber being coincident with a node circle on the diaphragm.
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| 申请公布号 |
US3761956(A) |
申请公布日期 |
1973.09.25 |
| 申请号 |
USD3761956 |
申请日期 |
1971.09.20 |
| 申请人 |
NITTAN CO LTD,JA |
发明人 |
TAKAHASHI N,JA;MORI H,JA;UEKI H,JA |
| 分类号 |
H04R7/16;H04R17/00;(IPC1-7):H04R17/00 |
主分类号 |
H04R7/16 |
| 代理机构 |
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