eFunda: Convert bel (power) to other Logarithm of a ratio units

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Calculators

bel (power)

Symbol:

B (power)

Category:

Logarithm of a ratio

SI Equivalent:

10 dB

Dimension:

nil (log)

Notes

Named after the telephone inventor, Alexander Graham Bell (1847-1922), the bel is a unit for expressing the ratio between two amounts of acoustic power. It is defined as log₁₀P₁/P₂.


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1 B (power) =

Logarithm of a ratio
	Symbol	Unit Name
2	B (voltage)	bel (voltage)
10	dB (power)	decibel (power)
20	dB (voltage)	decibel (voltage)
2.30259	N_P	neper


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