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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.
Convert     B (power)  
1 B (power) =
Logarithm of a ratio
  Symbol Unit Name
B (voltage)  bel (voltage) 
10  dB (power)  decibel (power) 
20  dB (voltage)  decibel (voltage) 
2.30259  NP  neper 
Glossary