Difference between revisions of "Dictionary:Absorption coefficient"
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If the amplitude ''A'' is expressed as | If the amplitude ''A'' is expressed as | ||
| + | <center> <math> A = A_0 e^{-\alpha x } \ </math> </center> | ||
| − | + | 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== | |
| + | * [[Dictionary:Q(Quality)|''Q'']] — quality factor | ||
Revision as of 16:22, 8 February 2012
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
