On Wed, Nov 23, 2011 at 06:54:35PM +0800, Junfeng Li wrote:
 
> Likely, my question is whether the similar equations as Eq. (3) exist when
> considering air absorption by extending Eq.(1) or Eq. (2). If it exists,
> what this extended equation should be?

If
 
A(w) = absorbtion in dB/m
d = distance between source image and receiver

then you would multiply by 10^{-A(w) * d / 20}

But this is so obvious that I must be missing the real
question...

-- 
FA

Vor uns liegt ein weites Tal, die Sonne scheint - ein Glitzerstrahl.

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