The invention relates to a noise reduction method and device, electronic equipment and a medium, and relates to the technical field of noise reduction, a reference microphone is installed in an air outlet pipeline of a cooling fan on a charging pile, an error microphone is installed at an air outlet of the air outlet pipeline, the reference microphone collects a reference noise signal in the air outlet pipeline, and the error microphone sends the reference noise signal to the charging pile; the error microphone collects an error noise signal at the air outlet; then screening out a part of signals from the reference noise signals as reference noise sub-signals, and screening out a part of signals from the error noise signals as error noise sub-signals; according to the charging pile, a reference noise sub-signal and an error noise sub-signal are generated, an anti-phase sound wave is generated according to the reference noise sub-signal and the error noise sub-signal, the reference noise sub-signal and the anti-phase sound wave are opposite in phase and the same in intensity, the anti-phase sound wave can offset the reference noise sub-signal, and the purpose of reducing noise of the reference noise signal is achieved. Only part of noise is reduced, so that the noise reduction purpose is achieved, and the noise reduction cost is saved.
本公开涉及一种降噪方法、装置、电子设备及介质,涉及降噪技术领域,参考麦克风安装在充电桩上散热风扇的出风管道内,误差麦克风安装在出风管道的出风口处,参考麦克风采集出风管道内的参考噪声信号,误差麦克风采集出风口处的误差噪声信号;然后从参考噪声信号中筛选出部分信号作为参考噪声子信号,并从误差噪声信号中筛选出部分信号作为误差噪声子信号;再根据参考噪声子信号和误差噪声子信号,生成反相声波,参考噪声子信号和反相声波两者的相位相反,强度相同,反相声波能将参考噪声子信号抵消,达到对参考噪声信号降噪的目的,由于充电桩所在的开阔场景对噪声有一定包容性,只对部分噪声进行降噪足以达到降噪目的,且节约降噪成本。
Noise reduction method and device, electronic equipment and medium
降噪方法、装置、电子设备及介质
2023-01-17
Patent
Electronic Resource
Chinese
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