空间自适应有源降噪方法

Adaptive Active Noise Control in Space

根据电力机车噪声的特点，建立了基于ＬＭＳ算法的自适应有源降噪系统，设计了室内脉冲响应测量系统，然后在此基础上对降噪系统进行数字仿真和实际声学实验。在仿真中，降噪量可达到４０ｄＢ，实际声学实验中，机车降噪量可达到１５ｄＢ。

An adaptive active noise control system based on LMS algorithm is set up.A measure system of impulse response in the room is designed according to the character of the noise in the motor driver cabin.In the adaptive active noise control system,the noise attenuation of the digital simulation is 40dB and the noise attenuation of the actual acoustic experiment is about 15 dB.