Acoustic pulse propagation near a right-angle wall

The Journal of the Acoustical Society of America
Lanbo Liu, D G Albert

Abstract

Experimental measurements were conducted around a right-angle wall to investigate the effect of this obstacle on sound propagation outdoors. Using small explosions as the source of the acoustic waves allowed reflected and diffracted arrivals to be discerned and investigated in detail. The measurements confirm that diffraction acts as a low-pass filter on acoustic waveforms in agreement with simple diffraction theory, reducing the peak pressure and broadening the waveform shape received by a sensor in the shadow zone. In addition, sensors mounted directly on the wall registered pressure doubling for nongrazing angles of incidence in line-of-sight conditions. A fast two-dimensional finite difference time domain (FDTD) model was developed and provided additional insight into the propagation around the wall. Calculated waveforms show good agreement with the measured waveforms.

References

Mar 30, 2000·The Journal of the Acoustical Society of America·J Kang
Aug 24, 2000·The Journal of the Acoustical Society of America·H DongJ M Hovem
Aug 21, 2002·The Journal of the Acoustical Society of America·K K Iu, K M Li

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Citations

Dec 2, 2010·The Journal of the Acoustical Society of America·Daniel Mennitt, Marty Johnson
Mar 25, 2010·The Journal of the Acoustical Society of America·Donald G Albert, Lanbo Liu
Jul 7, 2007·The Journal of the Acoustical Society of America·Vladimir E OstashevDavid Marlin
Jan 28, 2012·The Journal of the Acoustical Society of America·Victor SinghDavid R Dowling
Jun 9, 2014·The Journal of the Acoustical Society of America·Ravish MehraDinesh Manocha
Aug 7, 2008·The Journal of the Acoustical Society of America·W C Kirkpatrick AlbertsMark A Coleman
Oct 18, 2014·The Journal of the Acoustical Society of America·Yu ShaoShumin Wang
Feb 2, 2016·The Journal of the Acoustical Society of America·Sylvain CheinetThierry Broglin
Apr 5, 2017·The Journal of the Acoustical Society of America·Qi MoDinesh Manocha

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