发明名称 |
Method and circuit arrangement for suppressing the singing in telephone sets with loudspeakers |
摘要 |
To prevent acoustic feedback in telephone sets with built-in loudspeakers, depending on the direction of the respective signal flow, optionally either the microphone is muted by a shunt and/or the amplification of the loudspeaker is reduced in such a way that the total amplification of the transmitting and receiving parts remains below the critical singing limit.
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申请公布号 |
DE3103271(A1) |
申请公布日期 |
1982.08.26 |
申请号 |
DE19813103271 |
申请日期 |
1981.01.31 |
申请人 |
FRIEDRICH MERK-TELEFONBAU GMBH |
发明人 |
GEIGER,KLAUS,ING. |
分类号 |
H04M9/08;(IPC1-7):H04M9/10 |
主分类号 |
H04M9/08 |
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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