主动噪声控制声学通道的实验辨识

传统的自适应滤波器不能直接用于主动噪声控制，因为扬声器和误差传声器之间的声学通道可能使系统不稳定。本文根据声学通道的相应特性，建立补偿滤波器，提出了用实验方法辨识声学通道传输特性。在房间实验中研究了单通道相位因子的变化特性，并进一步用于飞机人多通道主动噪声控制，给出了相应的实验结果。

The experimental identification of the acoustic channel in active noise control

The usual adaptive filter can not be directly used in an active noise control system because there is an acoustic channel between the loudspeaker and the error microphone, and this acoustic channel will enable the system unstable. Based on the phase characteristic of the acoustic channel, we propose a method such that the transmission characteristic of the acoustic channel can be identified experimently. In room test, the errors of phase factor of a single channel are studied. The method is further applied to the active noise control in the cabin of an aircraft, and the test results are given.