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2013 Edition, August 1, 2013

Complete Document

Application of Pure-Tone Atmospheric Absorption Losses to One-Third Octave-Band Data

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Product Details:

  • Revision: 2013 Edition, August 1, 2013
  • Published Date: August 2013
  • Status: Active, Most Current
  • Document Language: English
  • Published By: SAE International (SAE)
  • Page Count: 31
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

This document presents a practical method for calculating atmospheric absorption for wide-band sounds analyzed with one-third octave-band filters, called the SAE Method. The SAE Method utilizes pure-tone attenuation algorithms originally published in ISO 9613-1 and ANSI S1.26-1995 to calculate path-length attenuation at mid-band frequencies. The equations introduced in this standard transform the pure-tone, mid-band attenuation to one-third octave-band attenuation.

The purpose of this guidance document is to extend the useful attenuation range of the Approximate Method outlined in ANSI S1.26-1995, and to replace ARP866A. Calculation of sound attenuation caused by mechanisms other than atmospheric absorption such as divergence, refraction, scattering due to turbulence, ground reflections, or non-linear propagation effects, is outside the scope of this document.
AIA/NAS Aerospace Standards