### decibel

• n. 分贝
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decibel 分贝

deci-, 十分之一。bel, 音量单位，来自19世纪苏格兰电话设计工程师Alexander Bell.

decibel (n.)
1928, from deci- + bel (n.).
Progress in science and industry is constantly demanding new terms and one of the latest of these is the word "decibel," coined by telephone engineers to describe the efficiency of telephone circuits. It is a substitute for the phrase "transmission unit." The actual unit decided upon was first called "bel," after the inventor of the telephone. The bel, however, is larger than is needed in practice, and, therefore, a unit one-tenth as large was adopted by engineers and named the decibel. ["Popular Mechanics," May 1929]
1. The decibel level was mounting.

2. The most usual system is that of the decibel scale.

3. A measure of sound intensity equivalent to one decibel at 1000 Hz.

4. In sound we use the decibel scale.

5. Specified as a decibel value over a frequency range.