| 单词 | bel (B) |
| 释义 | bel (B) In physics, a measure of comparative power ratio, or relative loudness. In other words, a unit of power ratio. The number of bels is the decimal logarithm of the power ratio, which is expressed mathematically as follows: B = log (P /P ) 10 1 2 where B = Bel, and P and P are power levels. One bel is equal to 10 decibels. The bel is named for 1 2 Alexander Graham Bell, inventor of the telephone, among other things. See Bell, Alexander Graham; decibel; logarithm; and power. |
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