How to deal with the phenomenon of “howling” and “empty sound” in the conference system

Source:YDIT 誉德 Release time:2019/5/16 10:06:04 Views:911

 

(Paperless conference system, ultra-thin integrated lifter) How to deal with the phenomenon of “howling” and “empty sound” in the conference system
"Howling" is caused by positive feedback between the speaker and the microphone. The main reason is that the microphone is too close to the speaker or the microphone is pointing to the speaker. The "empty sound" is generated by the sound wave delay. If the microphone picks up the sound source signal and picks up it. A signal that is restored by sound amplification, or a microphone that picks up a signal that has been restored by sound amplification, or two microphones that are different from the sound source pick up the signal of the same sound source, or one microphone picks up another microphone that has been restored by sound amplification. The signals will cause corresponding delays and cause delays. When these signals are superimposed, some frequency components cancel each other out, forming an "empty sound".
For the “howling” phenomenon, the following methods can be adopted to avoid the formation of the inherent resonance point: reduce the sound amplification gain; use the equalizer or the automatic feedback suppressor to reduce the amplitude of the howling frequency: connect the frequency shifter or the phase modulator, Shift the frequency or phase to destroy the in-phase condition of the feedback sound and the sound source, adjust the speaker layout, change the direction of the microphone, and the distance between the two. Avoid the formation of positive feedback (paperless conference system, ultra-thin integrated lift).
(Paperless conference system, ultra-thin one lifter) For the "empty sound" phenomenon, the following can avoid the sonic delay, use a directional microphone; turn off the ST switch in the mixer or pull down more microphone putters : Adjust the sound source and the proportion of the sound restored by the sound reinforcement.
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