| 发明名称 |
Method and apparatus for boosting an audible signal in a notification system |
| 摘要 |
The present invention is an apparatus and a concomitant method for boosting the audio signal generated by at least one notification appliance in a supervised emergency voice evacuation system.
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| 申请公布号 |
US2003169177(A1) |
申请公布日期 |
2003.09.11 |
| 申请号 |
US20020323875 |
申请日期 |
2002.12.19 |
| 申请人 |
WHEELOCK, INC |
发明人 |
CURRAN JOHN W.;APPLEGATE EDWARD V.;KOSICH JOSEPH;FETTERLY RICHARD H.;RUSSO ANTHONY W. |
| 分类号 |
H03F99/00;G08B3/10;G08B5/36;H04R27/00;H04R29/00;(IPC1-7):G08B7/00 |
主分类号 |
H03F99/00 |
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