名詞 decibel:

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

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n.Abbr. dB（名詞）縮寫 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.
分貝：通常表示兩個聲音信號或電力信號在功率或強(qiáng)度方面的相對差別的單位，相當(dāng)于兩個水平的比率的常用對數(shù)的十倍

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