About: Decibel

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An Entity of Type : http://qudt.org/schema/qudt/LogarithmicUnit, within Data Space : foodie-cloud.org, foodie-cloud.org associated with source document(s)

Attributes	Values
type	Unit http://qudt.org/schema/qudt/DimensionlessUnit http://qudt.org/schema/qudt/LogarithmicUnit
label	Decibel (en)
isDefinedBy	QUDT VOCAB Units of Measure Release 2.1.33
Description	A customary logarithmic measure most commonly used (in various ways) for measuring sound.Sound is measured on a logarithmic scale. Informally, if one sound is \(1\,bel\) (10 decibels) "louder" than another, this means the louder sound is 10 times louder than the fainter one. A difference of 20 decibels corresponds to an increase of 10 x 10 or 100 times in intensity. The beginning of the scale, 0 decibels, can be set in different ways, depending on exactly the aspect of sound being measured. For sound intensity (the power of the sound waves per unit of area) \(0\,decibel\) is equal to \(1\,picoWatts\,per\,Metre\,Squared\). This corresponds approximately to the faintest sound that can be detected by a person who has good hearing. For sound pressure (the pressure exerted by the sound waves) 0 decibels equals \(20\,micropascals\,RMS\), and for sound power \(0\,decibels\) sometimes equals \(1\,picoWatt\). In all cases, one decibel equals \(\approx\,0.115129\,neper\). (http://qudt.org/schema/qudt/LatexString)
http://qudt.org/schema/qudt/dbpediaMatch	dbpedia:Decibel
http://qudt.org/sc...asDimensionVector	http://qudt.org/vocab/dimensionvector/A0E0L0I0M0H0T0D1
http://qudt.org/sc...ormativeReference	http://en.wikipedia.org/wiki/Decibel?oldid=495380648
http://qudt.org/schema/qudt/symbol	dB
has quantity kind	Sound exposure level Sound power level sound pressure level Sound reduction index
http://qudt.org/sc.../applicableSystem	http://qudt.org/vocab/sou/ASU http://qudt.org/vocab/sou/CGS http://qudt.org/vocab/sou/CGS-EMU http://qudt.org/vocab/sou/CGS-ESU http://qudt.org/vocab/sou/CGS-GAUSS http://qudt.org/vocab/sou/IMPERIAL http://qudt.org/vocab/sou/PLANCK http://qudt.org/vocab/sou/SI
http://qudt.org/schema/qudt/iec61360Code	0112/2///62720#UAA409
http://qudt.org/schema/qudt/ucumCode	dB (http://qudt.org/schema/qudt/UCUMcs)
http://qudt.org/sc...t/uneceCommonCode	2N

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