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1 - db: what is a decibel?

de·ci·bel (d s -b l, -b l ). n. Abbr. dB. A unit used to express relative difference in power or intensity, usually between two acoustic or electric signals, equal to ten ...
http://www.animations.physics.unsw.edu.au/jw/dB.htm

2 - db: what is a decibel?

A Decibel is a measurement of Sound level. Read more...
http://www.animations.physics.unsw.edu.au/jw/dB.htm

3 - decibel - definition of decibel by the free online dictionary ...

A-weighted decibels, abbreviated dBA, or dBa, or dB(a), are an expression of the relative loudness of sounds in air as perceived by the human ear.
http://www.thefreedictionary.com/decibel

4 - decibel - definition of decibel by the free online dictionary ...

a : a unit for expressing the ratio of two amounts of electric or acoustic signal power equal to 10 times the common logarithm of this ratio b : a unit for expressing ...
http://www.thefreedictionary.com/decibel

5 - decibels (db) - definition and explanation of decibels (db)

Un décibel est l'unité de mesure de l'intensité du son. Un décibel est égal à 1/10 de bel ; une augmentation de l'intensité égale à 1 bel équivaut à peu près à un ...
http://hometheater.about.com/od/hometheaterglossary/g/decibeldef.htm

6 - decibels (db) - definition and explanation of decibels (db)

Decibel definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Look it up now!
http://hometheater.about.com/od/hometheaterglossary/g/decibeldef.htm