This calculator displays two functions in accordance with ASA/ANSI S1.26-2014 (R2024). Firstly, pure tone attenuation by air absorption for — all frequencies at a single point in space — based on distance, temperature, relative humidity, altitude, and atmospheric pressure. Secondly, all attenuation values in dB per meter distance — for a single frequency — for every combination of temperature and relative humidity.

features:

• in accordance with ASA/ANSI S1.26-2014 (R2024)
• 3 frequency responses (48 points-per-octave)
• normalization
• cut-off frequency (-6 dB)
• attenuation: temperature vs. relative humidity

file type: Microsoft Excel Open XML spreadsheet (.xlsx)

minimum requirements:

• Excel 2007 or higher
• Excel 2008 or higher

download calculator: