音响系统中除目的信号以外的所有信号都是噪声,是一种烦人的声音,但与目的信号形影不离。在加快城乡一体化建设的政策下,基层文化下乡活动越来越频繁,配套的流动舞台设施也跟着走进村寨。由于流动演出经常伴随着舞台灯光及农村电源是 All signals in the audio system, except the destination signal, are noisy and annoying, but inseparable from the intended signal. Under the policy of accelerating the integration of urban and rural areas, grassroots-based cultural activities in the countryside have become more frequent and the supporting mobile facilities have also followed the trend of entering the villages. As the show is often accompanied by flow of stage lighting and rural power is