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高清音频编解码器杂讯破音白皮书
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Practically speaking, feedback will occur on any electronically amplified sound system whenever the gains are turned up high enough. This document will explain why feedback occurs and some of the measures that can be used to avoid it. Care should always be taken to avoid setting gains high enough to cause feedback.
What is Acoustic Feedback?
The reverberation of sound waves from a loudspeaker to a preceding part of an audio system, such as to the microphone, in such a manner as to reinforce, and distort, the original input.
Acoustic feedback occurs in electronically amplified sound systems when enough of the sound coming from the speakers is received by the input microphone so as to be equal to or more than the original input.
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