利用自适应信号处理的有源噪声控制技术具有改变噪声谱形伏的独特能力,系统的操作灵活、维护费用较低,其性能和可靠性继续在改进,初装费用不断下降,它必将成为各种噪声控制工程的优选方案。 有源噪声控制用电信号激励扬声器产生相反波形的声音以进行噪声抵消。自适应数字信号处理技术用传声器接收不需要的噪声,经ⅡR自适应滤波器处理,然后由扬声器产生声波抵消。扬声器和误差传声器的信号特性由另一自适应滤波器用无规噪声连续修正并 The active noise control technique using adaptive signal processing has the unique ability to change the shape of the noise spectrum. The system has the advantages of flexible operation, low maintenance cost, continuous improvement in performance and reliability, and a declining initial installation cost. It will surely become A variety of noise control project of the preferred program. Active noise control signals energize the speaker to produce opposite-waveform sound for noise cancellation. Adaptive digital signal processing technology using microphones to receive unwanted noise, the IIR adaptive filter processing, and then by the speaker to generate acoustic cancellation. The signal characteristics of the loudspeaker and the error microphone are continuously corrected by another adaptive filter with random noise