Atmospheric Sound Propagation Analyzer
Tools
UNITS
ANSI/ASA S1.26-2014 LOADED
Atmospheric Sound Propagation Analyzer
Inverse Square Law
Formula Citations & References
[1] Primary Governing Standard
ANSI/ASA S1.26-2014 (R2024). American National Standard Method for the Calculation of the Absorption of Sound by the Atmosphere. Acoustical Society of America, New York. Reaffirmed 2024.
https://webstore.ansi.org/standards/asa/asaansis1262014r2024
[2] Pressure Correction & Saturation Vapor Pressure Fix
Bass, H.E., Sutherland, L.C., Zuckerwar, A.J., Blackstock, D.T., and Hester, D.M. (1995). "Atmospheric absorption of sound: Further developments." Journal of the Acoustical Society of America, 97(1), 680–683.
Erratum: JASA 99, 1259 (1996).
https://doi.org/10.1121/1.412989 Erratum: https://doi.org/10.1121/1.415223
[3] International Equivalent Standard
ISO 9613-1:1993. Acoustics — Attenuation of sound during propagation outdoors — Part 1: Calculation of the absorption of sound by the atmosphere. International Organization for Standardization. Confirmed current 2021.
https://www.iso.org/standard/17426.html
[4] Pro Audio Context & Speed of Sound Reference
Bohn, D.A. (1988). "Environmental effects on the speed of sound." Journal of the Audio Engineering Society, 36(4), 223–231. Presented at the 83rd AES Convention, New York, October 1987.
https://aes.org/publications/elibrary-page/?id=5156 Free PDF: proacousticsusa.com
[5] Reference Calculator (Cross-Validation)
National Physical Laboratory (NPL). Calculation of Absorption of Sound by the Atmosphere. UK's gold-standard online calculator built from the same formula chain. AtmosProp outputs have been cross-validated against NPL values.
https://www.npl.co.uk/acoustics
Comb Filter — Δ —
LEVEL RATIO
Atmospheric Conditions
TEMPERATURE
°F
RELATIVE HUMIDITY
%
ft
Live Positions
Traces
1 kHz – 20 kHz · 0 to -30 dB
ISL · ANSI/ASA S1.26-2014 · Bass et al. 1995 · -4°F TO 122°F · 20Hz–20kHz
DELAY ALIGNMENT TOOL
Speed of sound: — m/s