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Simplified procedure for computing the absorption of sound by the atmosphere

File Language:
English


Details

  • Alternative Title:
    Noise Control Engineering Journal
  • Creators:
    Rickley, Edward J. ; Fleming, Gregg G. ; Roof, Christopher J.
  • Corporate Creators:
    John A. Volpe National Transportation Systems Center (U.S.)
  • Subject/TRT Terms:
  • Resource Type:
    Journal
  • Geographical Coverage:
    United States
  • Abstract:
    This paper describes a study that resulted in the development of a simplified ; method for calculating attenuation by atmospheric-absorption for wide-band ; sounds analyzed by one-third octave-band filters. The new method referred to ; herein as the Volpe Method utilizes the accurate pure-tone sound absorption ; algorithms of two published standards, the International Standard, "Acoustics- ; Attenuation of Sound During Propagation Outdoors-Part 1: Calculation of the ; Absorption of Sound by the Atmosphere," ISO 9613-1 and, the American ; National Standard, "Method for Calculation of the Absorption of Sound by the ; Atmosphere," ANSI S1.26-1995. The purpose of the study was to extend the ; useful attenuation range of the Approximate Method outlined in the ANSI ; document, and provide a basis for replacing the current Society of Automotive ; Engineers Aerospace Recommended Practice 866A, "Standard Values of ; Atmospheric Absorption as a Function of Temperature and Humidity" (SAE ; ARP 866A). TheVolpe Method was found to be useable to mid-band absorption ; levels up to 500 dB with errors of less than ±0.5 dB or ±5% (of mid-band ; attenuation levels) to 100 dB, and ±7% to 500 dB. © 2007 Institute of Noise ; Control Engineering.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/9810/dot_9810_DS1.pdf
  • File Type:
    Filetype[PDF - 108.45 KB]
  • Collection(s):
    Volpe Center
  • Main Document Checksum:
    urn:sha-512:eaa621691788ad03000fc48729c562465000dd3b2cb1b2205a0dc8b146676c5598c7db4ab7ca6f88e2319e089769a8874af83ed7f97ef23f7e2d0113f1e4036e
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