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**● ****Conversion**** of ****dB**** (****decibel****) to ****bel**** ●**

**Logarithmic** **ratios**** as ****levels**** (****prefixes****) **

**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 twentyfold decadic logarithm of
the ratio of two linear values x_{1} and x_{0}: Level L = 20 × log (x_{1} / x_{0}), where x_{0} 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 |

would be equal to . So, 1 bel = 10 dB.

**Conversion from neper to decibel and vice versa**

Note: There is no conversion formula for measured dB values to weighted dBA values or vice versa. |

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