在考场里,监考老师正在强调考试要求。(1)监考老师的声音是由

在考场里,监考老师正在强调考试要求。(1)监考老师的声音是由声带的     产生的,是通过         传入考生耳中的。传播速度约为       m/s。考生能分辨出两位监考老师的声音不同,这主要是因为他们个人的     不同。(2)考试期间,考试周边禁止鸣笛,禁止施工,这种措施属于在             处减弱噪音。

答案

(1)振动空气340m/s。音色。(2)在声源处控制噪声解析:

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