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

被引：18

作者：

Ostashev, Vladimir E. ^{[1
]}

Scanlon, Michael V. ^{[2
]}

Wilson, D. Keith ^{[3
]}

Vecherin, Sergey N. ^{[4
]}

机构：

[1] NOAA, Earth Syst Res Lab, Boulder, CO 80303 USA

[2] USA, Res Lab, AMSRD ARL SE SP, Adelphi, MD 20783 USA

[3] USA, Engineer Res & Dev Ctr, Hanover, NH 03755 USA

[4] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA

来源：

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2008年 / 124卷 / 06期

关键词：

D O I：

10.1121/1.3003085

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

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. (C) 2008 Acoustical Society of America. [DOI: 10.1121/1.3003085]

引用

页码：3413 / 3420

页数：8

共 10 条

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