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分貝不同能量相同嗎(15點~急!!!)

Oct 24th 2013, 12:55

0分貝定義為20uPa，人類耳朵能夠聽到最微弱聲音，那麼說，即是有聲。

能量若以聲壓表示，據以下公式，是有分別

db=20log10(量到的聲壓)/(20uPa)

參考資料： http://zh點wikipedia點org/wiki/%E5%88%86%E8%B2%9D

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