更新時間：2022-07-01
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造成回聲的原因很多，一是室內(nèi)擴聲環(huán)境設計不合理，二是音箱布置不合理，三是音響設備和音響系統(tǒng)調(diào)試不好。具體包括以下四個方面：
There are many reasons for echo, one is the unreasonable design of indoor sound reinforcement environment, the other is the unreasonable layout of speakers, and the third is the poor debugging of sound equipment and sound system. Specifically, it includes the following four aspects:
(1)麥克風直接放置在揚聲器的輻射區(qū)，其軸心與揚聲器直接對齊。
(1) The microphone is directly placed in the radiation area of the speaker, and its axis is directly aligned with the speaker.
（2）擴聲環(huán)境中聲反射現(xiàn)象嚴重，周圍和天花板沒有用吸聲材料裝飾。
(2) Sound reflection is serious in the sound reinforcement environment, and the surrounding and ceiling are not decorated with sound-absorbing materials.
(3)音響設備匹配不當，信號反射嚴重，連接線虛焊，聲音信號流過時接觸點。
(3) The sound equipment is mismatched, the signal reflection is serious, the connecting wire is faulty, and the sound signal flows through the contact point.
(4)部分音響設備處于臨界工作狀態(tài)，聲音信號較大時出現(xiàn)振蕩。
(4) Some audio equipment is in critical working state, and oscillation occurs when the sound signal is large.
聲反饋是
舞臺音響擴聲中的一個令人頭疼的問題。無論是在劇院、場館還是歌舞廳，一旦發(fā)生聲反饋，不僅會破壞整個音響系統(tǒng)的正常工作狀態(tài)，破壞音質(zhì)，還會破壞會議、演出效果。因此，聲反饋的抑制是擴聲系統(tǒng)調(diào)試和應用過程中必須注意的一個極其重要的問題。音頻工作者應該了解聲反饋并找到更好的方法來避免或小化由聲反饋引起的嘯叫。.
Acoustic feedback is a headache in stage sound reinforcement. Whether in theatres, venues or song and dance halls, once acoustic feedback occurs, it will not only destroy the normal working state of the entire sound system, destroy the sound quality, but also destroy the effect of meetings and performances. Therefore, the suppression of acoustic feedback is an extremely important problem that must be paid attention to in the debugging and application of sound reinforcement system. Audio workers should understand acoustic feedback and find better ways to avoid or minimize the howling caused by acoustic feedback
另外，如果一個音響系統(tǒng)中有很多不同類型的音箱，確實沒有電子分頻器，而且不同類型的音箱使用的是全頻信號，沒有分頻，那么不同的音箱之間會有很多的頻率疊加和重復。揚聲器。在該部分，聲學干擾也會變得很嚴重，聲音會變得模糊，聲場很差，麥克風容易出現(xiàn)聲反饋。
In addition, if there are many different types of speakers in a sound system, and there is no electronic frequency divider, and different types of speakers use full frequency signals without frequency division, there will be a lot of frequency superposition and repetition between different speakers. Speakers. In this part, the acoustic interference will also become very serious, the sound will become blurred, the sound field is very poor, and the microphone is prone to sound feedback.
如果使用電子分頻器進行合理的分頻，使不同的揚聲器處于良好的工作狀態(tài)，使不同揚聲器之間的聲音頻率范圍幾乎不會重復，從而減少聲波相互干擾的現(xiàn)象。聲音會變得格外清晰，音色會更好，更有層次感！
If the electronic frequency divider is used for reasonable frequency division, different loudspeakers will be in good working condition, and the sound frequency range between different loudspeakers will hardly repeat, so as to reduce the mutual interference of sound waves. The sound will become particularly clear, and the timbre will be better and more layered!
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