Difference between revisions of "Dictionary:Absorption coefficient"

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If the amplitude A is expressed as

${\displaystyle A=A_{0}e^{-\alpha x}\ }$

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).