decibel

名词 decibel:

1. a logarithmic unit of sound intensity; 10 times the logarithm of the ratio of the sound intensity to some reference intensity
   同义词：dB

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n.Abbr. dB（名词）缩写 dB
A unit used to express relative difference in power or intensity, usually between two acoustic or electric signals, equal to ten times the common logarithm of the ratio of the two levels.
分贝：通常表示两个声音信号或电力信号在功率或强度方面的相对差别的单位，相当于两个水平的比率的常用对数的十倍

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