• Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

You are not logged in You are logged out of this journal. Log In

Journal of the Acoustical Society of America / Volume 124 / Issue 6 / AEROACOUSTICS, ATMOSPHERIC SOUND [28]

Source localization from an elevated acoustic sensor array in a refractive atmosphere

J. Acoust. Soc. Am. Volume 124, Issue 6, pp. 3413-3420 (2008); (8 pages)

Vladimir E. Ostashev1, Michael V. Scanlon2, D. Keith Wilson3, and Sergey N. Vecherin4

1NOAA/Earth System Research Laboratory, Boulder, Colorado 80303 and Physics Department, New Mexico State University, Las Cruces, New Mexico 88003
2U.S. Army Research Laboratory, AMSRD-ARL-SE-SP, Adelphi, Maryland 20783
3U.S. Army Engineer Research and Development Center, Hanover, New Hampshire 03755
4Physics Department, New Mexico State University, Las Cruces, New Mexico 88003

Full Text: Read Online (HTML) | Download PDF | Buy PDF (US$30) | View Cart
Localization of sound sources on the ground from an acoustic sensor array elevated on a tethered aerostat is considered. To improve estimation of the source coordinates, one should take into account refraction of sound rays due to atmospheric stratification. Using a geometrical acoustics approximation for a stratified moving medium, formulas for the source coordinates are derived that account for sound refraction. The source coordinates are expressed in terms of the direction of sound propagation as measured by the sensor array, its coordinates, and the vertical profiles of temperature and wind velocity. Employing these formulas and typical temperature and wind velocity profiles in the atmosphere, it is shown numerically that sound refraction is important for accurate predictions of the source coordinates. Furthermore, it is shown that the effective sound speed approximation, which is widely used in atmospheric acoustics, fails to correctly predict the source coordinates if the grazing angle of sound propagation is relatively large.

© 2008 Acoustical Society of America

ACKNOWLEDGMENTS

This research was supported by the Army Research Laboratory via a subagreement with the DoD Center for Geosciences/Atmospheric Research at Colorado State University under Cooperative Agreement W911NF-06-2-0015.

Article Outline

  1. INTRODUCTION
  2. THEORY
    1. Formulation of the problem
    2. Source coordinates
    3. Analysis
  3. VERTICAL PROFILES OF TEMPERATURE AND WIND VELOCITY
  4. SOURCE LOCALIZATION RESULTS
  5. CONCLUSIONS

RELATED DATABASES

To view database links for this article, you need to log in.

KEYWORDS and PACS

Keywords

acoustic arrays, acoustic wave propagation, acoustic wave refraction, aeroacoustics

PACS

  • 43.28.Fp

    Outdoor sound propagation through a stationary atmosphere, meteorological factors

  • 43.20.Dk

    Ray acoustics

ARTICLE DATA

History
Received 21 Feb 2008
Accepted 29 Sep 2008
Revised 27 Sep 2008
Digital Object Identifier
http://dx.doi.org/10.1121/1.3003085

PUBLICATION DATA

ISSN

0001-4966 (print)  

Publisher

$abstract.society.value is a Member of CrossRef Acoustical Society of America

For access to fully linked references, you need to log in.

Figures (5)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)



Close

Your Recent History Recent History Help

Recently Viewed

  1. Source localization from an elevated acoustic sensor array in a refractive atmosphere
  2. On the dynamic viscous permeability tensor symmetry
  3. Multichannel array diagnosis using noise cross-correlation
  4. Historical perspectives and ongoing developments in telematic performances.
  5. Benefit of high-rate envelope cues in vocoder processing: Effect of number of channels and spectral region

Home Publications Meetings Contact ASA Site Map Back to Top

Copyright © Acoustical Society of America

close