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在歌舞厅、夜总会等场所对抑制声反馈,往往是利用频率均衡器在舞池正中放置一高音质、宽频带的传声器,然后打开音响系统,从频率均衡器的最低频段开始,逐次将各频段的推钮提升到反馈临界点时再往回调3dB,即为反馈最佳调整位置。 其实不然,众所周知,频率均衡器的主要作用是: (1) 对厅堂内存在的建筑声缺陷进行弥补; (2) 对电声系统内存在的缺陷进行弥补。 用频率均衡器去弥补厅堂内存在的声反馈缺陷,往往得不到很好的效果,顾此失彼,因为引起声反馈的主要设备是传声器,特别是档次、质量比较差的传声器,更是如此。单纯的放音,只要设备不被损坏,无论开到多响,都不会存在声反馈问题,而传声器在
In song and dance halls, nightclubs and other places on the suppression of acoustic feedback, often using the frequency equalizer in the middle of the dance floor to place a high-quality, wideband microphone, and then open the sound system, starting from the lowest frequency band equalizer, one by one each band Push the button to raise the feedback point to the callback 3dB, which is the best feedback position. In actual fact, as we all know, the main role of the frequency equalizer is: (1) to make up for the existing building defects in the hall; (2) to make up for the defects existing in the electroacoustic system. The use of frequency equalizer to make up for the existence of acoustic feedback defects in the hall, often do not get good results, take this one off, because the main device causing acoustic feedback is the microphone, especially the grade, the microphone is relatively poor quality, even more so. Simply play, as long as the device is not damaged, no matter how many rings, there will be no acoustic feedback problem, and the microphone in