更新時間：2022-08-31
文章來源：http://m.74seba.com/
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反饋抑制器的主要作用是抑制由于音箱聲音傳到話筒而引起的聲反饋嘯叫，所以必須使它成為話筒信號和必經(jīng)之路才能達到完全、有效的抑制聲反饋嘯叫的目的。從目前的應用情況看，反饋抑制器的連接方法大致有3種。
智能會議系統(tǒng)廠家為您講解一番。
The main function of the feedback suppressor is to suppress the acoustic feedback howl caused by the sound from the speaker to the microphone. Therefore, it must be made the microphone signal and the only way to achieve the purpose of completely and effectively suppressing the acoustic feedback howl. According to the current application, there are roughly three connection methods for feedback suppressors. The intelligent conference system manufacturer will explain it to you.
串接在擴聲系統(tǒng)主通道均衡器后壓限器前，這是一種比較普遍采用的連接方法，連接非常容易，用一臺反饋抑制器就可以完成抑制聲反饋的任務。這種接法可能會對再現(xiàn)聲音質量有所影響，當然這些影響都有相應的解決辦法。
It is connected in series in front of the pressure limiter behind the equalizer of the main channel of the sound reinforcement system. This is a commonly used connection method. It is very easy to connect. The task of suppressing acoustic feedback can be completed with a feedback suppressor. This connection may have an impact on the reproduction sound quality. Of course, there are corresponding solutions to these effects.
一、是可能會對音樂節(jié)目源聲音信號產生破壞。由于反饋抑制器串接在主通道中，話筒信號和音樂節(jié)目源信號都要同時通過它，在反饋抑制器衰減反饋頻率時，就會造成音樂節(jié)目源聲音在這些頻率上的不足。
1、 It may damage the sound signal of the music program source. Since the feedback suppressor is connected in series in the main channel, the microphone signal and the music program source signal must pass through it at the same time. When the feedback suppressor attenuates the feedback frequency, the music program source sound will be insufficient in these frequencies.
但在實踐中發(fā)現(xiàn)，DSP1100P反饋抑制器對音樂節(jié)目源聲音的影響級小，用加與不加反饋抑制器的方法幾乎無法察覺到音樂聲音的變化。
However, in practice, it is found that the dsp1100p feedback suppressor has a small influence on the source sound of the music program, and it is almost impossible to detect the change of the music sound with or without the feedback suppressor.
究其原因，乃是由于DSP1100P衰減的頻帶寬度和衰減量由聲反饋嘯叫的頻帶寬度和嘯叫程度決定，寬度衰減得恰如其分，沒有過多地衰減頻率成分，所以對聲音破壞級小。
The reason is that the band width and attenuation amount of the dsp110p attenuation are determined by the band width and the howling degree of the acoustic feedback howl. The width is appropriately attenuated and the frequency component is not excessively attenuated, so the damage level to the sound is small.
即使對聲音有所影響也無妨，可以在調音臺的音樂節(jié)目源路根據(jù)DSP1100P反饋抑制器的顯示，用參量均衡器將衰減頻帶寬度寬且衰減得多的頻率適當提升即可。
Even if the sound is affected, it is OK to use the parametric equalizer to appropriately increase the frequency with a wide attenuation band width and much attenuation according to the display of the dsp1100p feedback suppressor on the music program source channel of the mixing station.
二、是可能會對話筒聲音信號有所影響。不同的話筒由于拾音特性和頻率的響應不同，其生產的聲反饋嘯叫頻率也會有所不同。
2、 Yes, it may affect the microphone sound signal. Because different microphones have different pickup characteristics and frequency response, the acoustic feedback howling frequency produced by them will also be different.
假如一只話筒的聲反饋嘯叫頻率為315Hz，另一只話筒的聲反饋嘯叫頻率為1kHz，用反饋抑制器抑制嘯叫時，會將315Hz和1kHz同時都衰減掉，結果就會造成315Hz嘯叫的話筒1kHz不足，1kHz嘯叫的話筒315Hz不足。這個問題，只要在調音臺話筒路將不足頻率進行適當補償就可以解決了。
If the acoustic feedback howling frequency of one microphone is 315hz and the acoustic feedback howling frequency of the other microphone is 1kHz, when the feedback suppressor is used to suppress the howling, both 315hz and 1kHz will be attenuated at the same time. As a result, the microphone with 315hz howling will be 1kHz insufficient and the microphone with 1kHz howling will be 315hz insufficient. This problem can be solved as long as the insufficient frequency is properly compensated in the microphone circuit of the mixer.
The usage of the feedback suppressor in the intelligent conference system has been explained. If you have any questions, please come to our website at any time http://m.74seba.com Consult and understand!
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