話筒離音箱太近,又差不多對著音箱,從音箱出來的聲音又被放大,從音箱送出.於是就成了尖叫.又叫"自激振蕩".
話筒離音箱太近,又差不多對著音箱,從音箱出來的聲音又被放大,從音箱送出.於是就成了尖叫.又叫"自激振蕩".
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