【单选题】【消耗次数：1】
对传声器的说法完全正确的是
①
传声器是电能转换成声能的器件
②
传声器由振动膜和音圈两个基本部分组成
③
教师讲课适合选用全向性话筒，讨论为适合选用单向性话筒
④
为达到好的效果，话筒应1,245度角放在嘴下面
参考答案：
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相关题目
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①
录音机机内驻体话筒的录音效果不如外接话筒好
②
受外界环境噪声影响大
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录制时传声器最好拿在手中
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应根据录制要求选择不同方向的话筒
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关掉扬声器音量
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