Decibel
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The decibel is the unit of sound pressure used to measure noise. Decibel means 1/10 of a Bel, after Alexander Graham Bell. Because decibels are such a small measure, they are computed logarithmically and cannot be added arithmetically. An increase of ten dB is perceived by human ears as a doubling of noise. There is no absolute decibel scale, so the decibel is used to measure sound in comparison to another sound. When the decibel level gets too high, it may cause pain, and ceases to be awesome.