发明名称 Telecommunication apparatus capable of controlling audio output level in response to a background noise
摘要 A method of detecting a noise level from audio signals produced consecutively in time by a microphone. The method includes the steps of evaluating an average level of the audio signals consecutively in time, and selecting the smallest of the average levels as the noise level. A telecommunication apparatus for adaptively controlling an audio output level in response to the noise level thus detected is also disclosed.
申请公布号 US6125288(A) 申请公布日期 2000.09.26
申请号 US19970815571 申请日期 1997.03.12
申请人 RICOH COMPANY, LTD. 发明人 IMAI, YUKIHIRO
分类号 H04M1/19;H03G3/32;H04M1/00;H04M1/60;(IPC1-7):H04B1/38 主分类号 H04M1/19
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