公开(公告)号：WO2014066246A4

公开(公告)日：2014-07-17

申请号：PCT/US2013065938

申请日：2013-10-21

Applicant: ALCATEL LUCENT

Inventor： ETTER WALTER

IPC: H03G3/30 ,  H04R3/00

CPC classification number: H03G3/20 ,  H03G3/3005 ,  H04R3/04 ,  H04R2410/00

Abstract: An automatic gain control derives the gain from the distance between the sound source and the microphone. The distance-based automatic gain control normalizes signal level changes caused by a speaker not maintaining a constant distance with respect to the microphone. Also, a proximity-effect compensation that derives the adaptive filter from the distance between the sound source and the microphone. The proximity-effect compensation corrects frequency response changes due to undesired proximity-effect variations. Determination of the distance between a sound source and a microphone permits accurate compensation for both frequency response changes and distance-related signal level changes.

Abstract translation: 自动增益控制从声源和麦克风之间的距离中获得增益。 基于距离的自动增益控制使由不相对于麦克风保持恒定距离的扬声器引起的信号电平变化标准化。 而且，从声源和麦克风之间的距离导出自适应滤波器的接近效应补偿。 接近效应补偿由于不期望的接近效应变化而校正频率响应变化。 确定声源和麦克风之间的距离允许对频率响应变化和与距离有关的信号电平变化的精确补偿。