利用电子线路和扩声设备产生与噪声的相位相反的声音──反声,来抵销原有的噪声而达到降噪目的的技术,也称为反声技术。用于有源降噪的仪器设备称为电子吸声器或电子消声器。有源降噪技术和利用吸声材料将声能转变为热能的降噪技术相比,其原理截然不同。
有源降噪(Active Noise Reduction)也称反声(Anti—Sound)。在有源降噪中,原有 噪声的能量被次级声源吸收并转化为热能的情况称为有源消声(Active Sound Cancellati...
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Traditional active noise control(ANC) system applied to cancel out the whole energy in the sound field,but ignore that the useful signal is mixed with the noise.
传统有源降噪(ANC)系统希望将声场的能量全部抵消,忽略了有用信号的存在。
参考来源 - 基于ICA预处理的ANC参考信号获取·2,447,543篇论文数据,部分数据来源于NoteExpress
听力保护器。安全要求和试验。第5部分:有源降噪耳罩。
Hearing protectors - Safety requirements and testing - Part 5: active noise reduction ear-muffs.
在密闭型耳罩中,利用有源降噪技术可以较好地衰减低频噪声以使整个可听声频率范围内获得良好的衰减特性。
L. f. noise can be better attenuated so as to obtain good attenuation characteristics over the entire audible frequency range by using active noise reduction technique in the closed-air type earmuff.
同时,计算机仿真说明,只要参考输入中信号分量较少,自噪声有源抵消器仍然可以达到较好的降噪效果。
Computer simulations also validate that the good attenuation effect can be obtained in the active self noise canceler if the signal component in the reference input is small.
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