Fontem paginae Decibel inspicere

'''''Decibel''''' (symbolo '''''dB''''') est pars decima unitatis relativae '''''Bel''''', quo exprimitur [[ratio (mathematica)|ratio]] [[logarithmus|logarithmus decimalis]] inter [[Potentia (physica)|potentias]] quantitates duas. Adhibetur in [[telecommunicatio]]ne, [[electronica]], [[acustica]], [[oecologia]]<ref>'''CDC''': [https://www.cdc.gov/nceh/hearing_loss/what_noises_cause_hearing_loss.html Quae strepitu molestia surditatem perficiat?] {{Ling|Anglice}}</ref>.

Valorem ''dB'' vel quantitatem relativam (per exemplum +1 dB seu -1 dB), ita mutationem indicantem, vel absolute adhiberi licet. Ratio quantitatis [[logarithmus|logarithsmo]] radice dix quarere potest, in [[formula (mathematica)|formula]]:
:<math>
L_P = \frac{1}{2} \ln\!\left(\frac{P}{P_0}\right)\,\text{Np} = 10 \log_{10}\!\left(\frac{P}{P_0}\right)\,\text{dB}
</math>

== Notae ==
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{{NexInt}}
* [[Auris]]
* [[Megaphonum]]
* [[Surditas]]

{{physica-stipula}}
[[Categoria:Unitates physicae]]
{{Myrias|Physica}}