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decibel (voltage)
Symbol:  dB (voltage) 
Category:  Logarithm of a ratio 
SI Equivalent:  0.5 dB
Dimension nil (log) 
 
Notes
Named after the telephone inventor, Alexander Graham Bell (1847-1922), the decibel 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 20·log10P1/P2.
Convert     dB (voltage)  
1 dB (voltage) =
Logarithm of a ratio
  Symbol Unit Name
5×10-2  B (power)  bel (power) 
0.1  B (voltage)  bel (voltage) 
0.5  dB (power)  decibel (power) 
0.115129  NP  neper 
Glossary
Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Selecting the Right 3D Printer

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

STEM Career Outlook

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

Injection Molding Design Guide

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