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BY:Homepage
DATE:1996-08-22

ISO 9613 - 1

Acoustics - Attenuation of sound during propagation outdoors -

Part 1:
Calculation of the absorption of sound by the atmosphere

Air pressure in Pa
(typically 101325)
Air temperature
in degrees Celcius
Relative humidity
in %
Sound frequency
in Hz

Enter data in each box above. Click below for result.


dB per km

Notes:

1] JavaScript Browser such as Netscape v.2 or better required

2] No input form constraint checking - be careful to input correctly

3] Values calculated are from actual input frequencies - whereas the tables in ISO 9613 are preferred 1/3 octave frequencies

4] No guarantee of any kind whatsoever for this software

5] Reference should be made to the Standard for full details including accuracy ranges
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URL: http://www.oocities.org/SiliconValley/7116/jv_acou.html