发明名称 Method and system for controlling a maximum signal level output to headphones coupled to a wireless device
摘要 A method for controlling a maximum signal level output to headphones of a wireless device is provided. The method includes: determining an impedance of the headphones; determining a carrier specific maximum signal level for headphones having the impedance; and, adjusting an audio amplifier of the wireless device coupled to the headphones to restrict the maximum signal level output to the headphones to the carrier specific maximum signal level.
申请公布号 US8189798(B2) 申请公布日期 2012.05.29
申请号 US20090394218 申请日期 2009.02.27
申请人 MARTIN CYRIL;RESEARCH IN MOTION LIMITED 发明人 MARTIN CYRIL
分类号 H04R29/00 主分类号 H04R29/00
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