话筒离音箱太近,又差不多对着音箱,从音箱出来的声音又被放大,从音箱送出.于是就成了尖叫.又叫"自激振荡".
话筒离音箱太近,又差不多对着音箱,从音箱出来的声音又被放大,从音箱送出.于是就成了尖叫.又叫"自激振荡".
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