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    • 3. 发明申请
    • CONTROLLER FOR A HEADPHONE ARRANGEMENT
    • 电话安排的控制器
    • WO2011095912A1
    • 2011-08-11
    • PCT/IB2011/050333
    • 2011-01-26
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.VAN DE PAR, Steven Leonardus Josephus Dimphina ElisabethKOHLRAUSCH, Armin Gerhard
    • VAN DE PAR, Steven Leonardus Josephus Dimphina ElisabethKOHLRAUSCH, Armin Gerhard
    • H04R1/10
    • H04R1/1083H04R1/1041H04R2430/01
    • A controller for a headphone arrangement (101) comprises a drive circuit (203) which generates a signal for an earphone (105) from an audio signal. The drive signal is fed to the earphone (105) causing this to reproduce the audio signal. A first circuit (217) determines a signal level for the audio signal and a second circuit (209) determines an ambient sound level from a microphone signal from a microphone (109). A third circuit (211) determines an attenuated ambient sound level for the user from the microphone signal and an ambient sound attenuation of the earphone (105). A gain controller (205) controls the gain of the audio drive circuit (203) for the audio signal in response to the ambient sound level, the attenuated ambient sound level and the signal level. The dynamic and automated gain control may be used to reduce the risk of hearing damage e.g. by automatically restricting the sound level experienced by the user to the ambient sound level.
    • 用于耳机装置(101)的控制器包括从音频信号产生用于耳机(105)的信号的驱动电路(203)。 驱动信号被馈送到耳机(105),使其再现音频信号。 第一电路(217)确定音频信号的信号电平,第二电路(209)从麦克风(109)的麦克风信号确定环境声级。 第三电路(211)根据麦克风信号和耳机(105)的环境声音衰减确定用户的衰减环境声级。 增益控制器(205)响应于环境声级,衰减的环境声级和信号电平来控制音频信号的音频驱动电路(203)的增益。 动态和自动增益控制可用于降低听觉损伤的风险,例如, 通过自动将用户所经历的声音水平限制在环境声级上。