Difference between revisions of "Decibel"
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| − | The '''decibel''' ('''dB''') is a logarithmic unit, often used to measure | + | 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. |
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| + | One website states that anything above 70 dB can cause hearing loss over a period of time.<ref>https://www.hear.com/resources/hearing-loss/decibels-chart/</ref> This includes professional sports games, rock concerts, construction, and firearms. | ||
| + | [[Category:Units of Measurement]][[Category:Physics]] | ||
[[Category:Articles needing major improvement]] | [[Category:Articles needing major improvement]] | ||
Latest revision as of 17:31, October 14, 2023
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 0Â 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 1Â kHz.
One website states that anything above 70 dB can cause hearing loss over a period of time.[1] This includes professional sports games, rock concerts, construction, and firearms.