Definition of "decibel" [decibel]

• A unit used to express relative difference in power or intensity, usually between two acoustic or electric signals, equal to ten times the common logarithm of the ratio of the two levels. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "A few years ago curiosity led me to sneak a decibel meter into a ballgame between the"
• "Remember, though, that a decibel is a ratio measurement relative to some standard."
• "A decibel is a tenth-root-of-ten fold increase in power delivery. en Español"