Generating sequences of acoustic scintillations
Journal article, 2017

Spatial and temporal inhomogeneities in temperature and wind velocity affect sound propagation resulting in amplitude and phase fluctuations called scintillations. A computationally efficient method is presented to generate sequences of scintillations. The method, already used in the field of wireless communication to predict the performance of wireless communication links, could be used in the field of acoustics to create more perceptually valid auralizations. A Gaussian spectrum and a spherical wavefront is considered, but the method can also be used in combination with other spectra like the Von Karman spectrum as well as plane waves. Two examples are given, one is a pure tone affected by the scintillations and the other is an auralization of an aircraft fly-over. The effect of the transverse speed of the source is demonstrated as well.

Acoustics

propagation

auralization

atmospheric-turbulence

Author

Frederik Rietdijk

Chalmers, Civil and Environmental Engineering, Applied Acoustics, Vibroacoustics

Jens Forssén

Chalmers, Civil and Environmental Engineering, Applied Acoustics, Vibroacoustics

K. Heutschi

Swiss Federal Laboratories for Materials Science and Technology (Empa)

Acta Acustica united with Acustica

1610-1928 (ISSN)

Vol. 103 2 331-338

Subject Categories

Fluid Mechanics and Acoustics

DOI

10.3813/AAA.919061

More information

Latest update

11/21/2018