Difference between revisions of "Dictionary:Absorption coefficient"

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(force LaTeX with space at end of eqn; use ordinary HTML code for Greek chars; See also section)
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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, &alpha; 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/&lambda;). Distinction may or may not be made as to the reason for attenuation (i.e., absorption or some other mechanism).
  
where ''x''=distance, &#x03B1; 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/&#x03BB;). Distinction may or may not be made as to the reason for attenuation (i.e., absorption or some other mechanism). See [[Dictionary:Q(Quality)|''Q'']].
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==See also==
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* [[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