Simulating acoustic scattering from atmospheric temperature fluctuations using a k-space method

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Hargreaves, JA ; Kendrick, P ; Von-Hunerbein, SUM
  • Publisher: Acoustical Society of America
  • Related identifiers: doi: 10.1121/1.4835955
  • Subject: built_and_human_env | energy

This paper describes a numerical method for simulating far-field scattering from small regions of inhomogeneous temperature fluctuations. Such scattering is of interest since it is the mechanism by which acoustic wind velocity profiling devices (Doppler SODAR) receive backscatter. The method may therefore be used to better understand the scattering mechanisms in operation and may eventually provide a numerical test-bed for developing improved SODAR signals and post-processing algorithms. The method combines an analytical incident sound model with a k-space model of the scattered sound close to the inhomogeneous region and a near-to-far-field transform to obtain far-field scattering patterns. Results from two test case atmospheres are presented: one with periodic temperature fluctuations with height and one with stochastic temperature fluctuations given by the Kolmogorov spectrum. Good agreement is seen with theoretically predicted far-field scattering and the implications for multi-frequency SODAR design are discussed.
  • References (21)
    21 references, page 1 of 3

    3A. Nagaraju, A. Kamalakumari, and M. Purnachandra Rao, “Application of pulse compression techniques to monostatic doppler SODAR,” Glob. J. Res. Eng. 10, 37-40 (2010). Available online at http://www.

    4T. J. Cox, “Acoustic iridescence,” J. Acoust. Soc. Am. 129, 1165-1172 (2011).

    5V. I. Tatarski, Wave Propagation in a Turbulent Medium (Dover Publications Inc., New York, 1961), 285 pp.

    6M. A. Kallistratova, “Backscattering and reflection of acoustic waves in the stable atmospheric boundary layer,” IOP Conf. Ser. Earth Environ. Sci. 1, 14 (2008).

    7V. E. Ostashev, Acoustics in Moving Inhomogeneous Media (Spon Press, London, 1997), 259 pp.

    8M. Legg, “Multi-frequency clutter-rejection algorithms for acoustic radars,” Masters thesis, The University of Auckland, Auckland, Australia, 2007.

    9B. Piper, S. Bradley, and S. von Hunerbein, “Calibration method principles for monostatic sodars,” UPWIND Project Report (University of Salford, Manchester, UK, 2007).

    10R. Blumrich and R. Heimann, “A linearized Eulerian sound propagation model for studies of complex meteorological effects,” J. Acoust. Soc. Am. 112, 446-455 (2002).

    11V. E. Ostashev, D. K. Wilson, L. Liu, D. F. Aldridge, N. P. Symons, and D. Marlin, “Equations for finite-difference, time-domain simulation of sound propagation in moving inhomogeneous media and numerical implementation,” J. Acoust. Soc. Am. 117, 503-517 (2005).

    12D. K. Wilson and L. Liu, Finite-Difference, Time-Domain Simulation of Sound Propagation in a Dynamic Atmosphere (US Army Corps of Engineers Engineer Research and Development Center, Hanover, NH, 2004).

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