| Deutsche Version |
• Conversion of dB (decibel) to bel •
Logarithmic ratios as levels
Conversion of international level units decibels and bels
The level L is the ratio we are using with sound recording techniques, that is in bel (after Alexander
Graham Bell) or in tenth part of it as decibel. Definition: dB is the twenty fold decadic logarithm of
the ratio of two linear values x1 and x0: Level L = 20 × log x1 / x0, where x0 is the reference point.
Question: The dynamic region of a standard audio CD is 96 dB. How many bels are this?
Help: 1 dm = 0.1 m and 1 dB = 0.1 bel
1 m = 10 dm and 1 bel = 10 dB
A given power level
, measured with respect to the reference power level
,
would equal
. So, 1 Bel = 10 dB.
Conversion from neper to decibel and vice versa.
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