扩音系统中声反馈的抑制方法

Briefly on the Inhibition of Acoustic Feedback from Sound Amplification System

声反馈直接影响扩音系统的音质,严重时会破坏整个系统的稳定,在现场使用扩音系统时应采取必要的措施予以抑制。从声反馈的产生和危害入手,剖析了声反馈产生的原因,并重点从改变振幅条件和相位条件方面论述了对声反馈的抑制方法。

The acoustic feedback can directly affect the sound quality of the sound amplification system.When it gets serious,the stability of the system will be damaged.Therefore,when we use the public address system in the site,the necessary measures should be taken to restrain the feedback.This thesis is on the basis of the formation and then endanger of the acoustical feedback,and then analyzes the causes of the acoustical feedback.Finally,it focuses on discussing the inhibition of acoustic feedback in terms of the Amplitude condition and the Phase conditions.