Difference between revisions of "Dictionary:Absorption coefficient"
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| − | <translate>{{#category_index:A|absorption coefficient}} | + | <translate><!--T:1--> |
| + | {{#category_index:A|absorption coefficient}} | ||
If the amplitude ''A'' is expressed as | If the amplitude ''A'' is expressed as | ||
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<center> <math> A = A_0 e^{-\alpha x } \ </math> </center> | <center> <math> A = A_0 e^{-\alpha x } \ </math> </center> | ||
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where ''x''=distance, α is the absorption coefficient or attenuation factor. It usually varies linearly with frequency and is often expressed in dB/wavelength (typically 0.20 to 0.50 dB/λ). Distinction may or may not be made as to the reason for attenuation (i.e., absorption or some other mechanism). | where ''x''=distance, α is the absorption coefficient or attenuation factor. It usually varies linearly with frequency and is often expressed in dB/wavelength (typically 0.20 to 0.50 dB/λ). Distinction may or may not be made as to the reason for attenuation (i.e., absorption or some other mechanism). | ||
| − | ==See also== | + | ==See also== <!--T:4--> |
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* [[Special:MyLanguage/Dictionary:Q(Quality)|''Q'']] — quality factor | * [[Special:MyLanguage/Dictionary:Q(Quality)|''Q'']] — quality factor | ||
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Latest revision as of 11:32, 8 December 2017
If the amplitude A is expressed as
where x=distance, α is the absorption coefficient or attenuation factor. It usually varies linearly with frequency and is often expressed in dB/wavelength (typically 0.20 to 0.50 dB/λ). Distinction may or may not be made as to the reason for attenuation (i.e., absorption or some other mechanism).
See also
- Q — quality factor
