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What does a decibel measure?

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02/19/2011

Decibels measure a ratio of two values of the same unit.

Answer:

A decibel is measure of loudness of sound although it can be applied to other applications. The base unit is the bel and a tenth of that the decibel. In the real world a decibel of sound is about the weakest sound a person can hear - as an example the rubbing of your finger and thumb together at arms length.