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zao sheng mian mian guan
Author(s): 
Pages: 121-122
Year: Issue:  Z2
Journal: School Journal of Mathematics

Keyword:  噪声三个要素振动波形物理性质声音机械振动音色响度高强度农作物;
Abstract: <正>江西省永新县芦溪中学的刘小强同学问:“噪声有三个要素吗?”这就是问能否用音调、响度和音色这订购个要素来描述噪声.我们知道,通常人耳对频率处在20Hz至20 000 Hz的机械振动才有感觉,我们称它为声音.由于乐声和噪声同属声音,所以我们都可以用音调、响度和音色来描述它们.
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