| 释义 |
分贝fēnbèi计量声音强度或电功率相对大小的单位,它的数值等于音强或功率比值的常用对数的10倍。当选定一个基准音强或功率时,分贝数也表示音强或功率的绝对大小。{decibel (db); unit of measurement for the relative intensity of sound or electric power, equivalent to 10 times the common logarithm of the ratio of sound intensity or power. Relative to a base intensity of sound or electric power, the decibel count also indicates the absolute value of the sound intensity or electric power.}[英 decibel] |