METHOD AND APPARATUS FOR LISTENER SIDETONE CONTROL
摘要
A method of adjusting listener sidetone in a handset is provided. Measured ambient noise level of the handset microphone signal is compared against a predetermined threshold. The sidetone level is adjusted by a predetermined amount in response to whether the measured ambient noise level received at the handset microphone is higher or lower than the predetermined threshold.
申请公布号
WO9911047(A1)
申请公布日期
1999.03.04
申请号
WO1998CA00674
申请日期
1998.07.22
申请人
NORTHERN TELECOM LIMITED
发明人
FORRESTER, CHRISTOPHER, MICHAEL;GRAHAM, JOHN, STEPHEN;PROVENCAL, PAUL