Difference between revisions of "Decibel"
Jump to navigation
Jump to search
m |
DavidB4-bot (talk | contribs) (→top: clean up & uniformity) |
||
| Line 1: | Line 1: | ||
| − | The '''decibel''' ('''dB''') is a logarithmic unit, often used to measure sound [[pressure]]. Decibel means 1/10 of a Bel, after [[Alexander Graham Bell]]. There is no absolute decibel scale, so the decibel is used to measure sound in comparison to another sound, i.e, the 0 dB reference. This is defined as a sound pressure level of .0002 microbar, or 20 micropascals: commonly the threshold of hearing a sound with a frequency of 1 KHz. | + | The '''decibel''' ('''dB''') is a logarithmic unit, often used to measure sound [[pressure]]. Decibel means 1/10 of a Bel, after [[Alexander Graham Bell]]. There is no absolute decibel scale, so the decibel is used to measure sound in comparison to another sound, i.e, the 0 dB reference. This is defined as a sound pressure level of .0002 microbar, or 20 micropascals: commonly the threshold of hearing a sound with a frequency of 1 KHz. |
| − | [[ | + | [[Category:Units of Measurement]][[Category:Physics]] |
[[Category:Articles needing major improvement]] | [[Category:Articles needing major improvement]] | ||
Revision as of 11:31, July 13, 2016
The decibel (dB) is a logarithmic unit, often used to measure sound pressure. Decibel means 1/10 of a Bel, after Alexander Graham Bell. There is no absolute decibel scale, so the decibel is used to measure sound in comparison to another sound, i.e, the 0 dB reference. This is defined as a sound pressure level of .0002 microbar, or 20 micropascals: commonly the threshold of hearing a sound with a frequency of 1 KHz.