Talk:Engineering Acoustics/Outdoor Sound Propagation

Wrong: Table 1 - Atmospheric attenuation coefficient (dB/km) at selected frequencies at 1 atm
At low temperatures are wrong figures. 77.186.26.192 (discuss) 08:13, 3 September 2013 (UTC)

L or I?
I was looking at Section 4: Sound attenuation, and after the forumla using A, Ips, Ipr, Pps and Ppr as variables, the text says "where Lps is..." and later "and Lpr is...". I see no Lps or Lpr in the formula.

I believe the formula should read 'AT = Lps - Lpr = ...'

-5/2?
The python implementation uses math.pow(T0 / T, 2.5), but the formulas including the MatLab program call for -5/2. I'm going to "correct" this until someone explains why the sign was dropped. Additionally, none of the values in the table match those generated by the code (with our without the minus sign correction.)