loudness unit

基本解释

The decibel is the unit used to measure the loudness of sound.
分貝是用來測定聲音大小的單位。
TV sets and radios add up to 90 or J00 decibels, a certain unit used to measure the loudness of sound.
電眡機和收音機加起來90或J00分貝，某單位用來測量聲音的響度。
Sound is a form of energy transfer and we could define loudness in terms of the energy per unit of time or power output of the sound, but it wouldn't give the complete picture.
聲音是能量傳遞的一種形式，我們可以用單位時間內的能量，或聲音産生的能量來爲衡量響度，但這還不全麪。
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