History of Decibel

	Revision 8 . . December 3, 2001 12:37 pm by (logged).109.250.xxx [coined by Bell --> named in honour of Bell]
	Revision 7 . . December 3, 2001 12:36 pm by (logged).109.250.xxx [one tenth of a bel; not an SI unit, although recommended for use by CIPM]
	Revision 6 . . October 2, 2001 2:18 am by DrBob [Generalised, decibels are also used outside accoustics]

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Changed: 1c1

A logarithmic unit used to relate two quantities, abbreviated as "dB". Term coined by Alexander Graham Bell. Often used in acoustics to quantify sound pressure relative to a reference pressure level. A decibel is one tenth of a bel?. The decibel is not an SI unit, although the CIPM? has reccomended its inclusion in the SI system.

A logarithmic unit used to relate two quantities, abbreviated as "dB". It was named in honour of Alexander Graham Bell. Often used in acoustics to quantify sound pressure relative to a reference pressure level. A decibel is one tenth of a bel?. The decibel is not an SI unit, although the CIPM? has reccomended its inclusion in the SI system.