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    • 5. 发明授权
    • Setting a microphone volume level
    • 设置麦克风音量级别
    • US5949886A
    • 1999-09-07
    • US548404
    • 1995-10-26
    • Ralph J. NevinsNancy Gardner
    • Ralph J. NevinsNancy Gardner
    • H03G3/00H03G3/32
    • H03G3/001H03G3/32
    • A microphone volume level controller, for use with a speech recognition system, sets a volume level of a microphone in response to measured environmental conditions. Parameters of an input signal generated by a microphone are measured at multiple microphone volume levels. Based on the measured parameters, a volume level is determined that compensates for environmental conditions. The microphone volume level is set to the determined volume level. Speech recognition system error conditions are detected by comparing input signal levels detected by a microphone at a lower volume level and a higher volume level. If the difference between the signal levels at the lower and higher signal levels falls below a predetermined threshold, the user is notified of a possible error condition.
    • 与语音识别系统一起使用的麦克风音量电平控制器响应于测量的环境条件来设置麦克风的音量。 由麦克风产生的输入信号的参数是在多个麦克风音量级别测量的。 基于测量的参数,确定补偿环境条件的体积水平。 麦克风音量级别设置为确定的音量级别。 通过比较由较低音量级别和较高音量级别的麦克风检测到的输入信号电平来检测语音识别系统错误状况。 如果在较低和较高信号电平处的信号电平之间的差值低于预定阈值,则向用户通知可能的错误状况。