Units Currencies
Constants
Units Home
Unit Conversion
List Units
List Categories
Currencies
Convert Units
SI System
Base Units
Derived Units
Prefixes
Numbers
Constants
Base-N
Fractions
Time / Decimal
Resources
Bibliography
Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

more free publications
 
bel (voltage)
Symbol:  B (voltage) 
Category:  Logarithm of a ratio 
SI Equivalent:  5 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. When used to express the ratio of the magnitudes of two electric voltages, electric currents, and sound pressure, It is defined as 2┬Ělog10P1/P2.
Convert     B (voltage)  
1 B (voltage) =
Logarithm of a ratio
  Symbol Unit Name
0.5  B (power)  bel (power) 
dB (power)  decibel (power) 
10  dB (voltage)  decibel (voltage) 
1.15129  NP  neper 
Glossary
Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.