Skip to main content
Journal cover image

Improvement of a high-frequency broadband energy-intensity boundary element method to include high resolution specular reflection

Publication ,  Journal Article
Rouse, J; Franzoni, L
Published in: Journal of Computational Acoustics
March 1, 2005

The prediction of the spatial mean-square pressure distribution within enclosed high-frequency broadband sound fields is computationally intensive if determined on a frequency-by-frequency basis. Recently an energy-intensity boundary element method (EIBEM) has been formally developed. This method employs uncorrelated broadband directional energy sources to expeditiously predict such pressure distributions. The source directivity accounts for local correlation effects and specular reflection. The method is applicable to high modal density fields, but not restricted to the usual low-absorption, diffuse, and quasi-uniform assumptions. The approach can accommodate fully specular reflection, or any combination of diffuse and specular reflection. This boundary element method differs from the classical version in that element size is large compared to an acoustic wavelength and equations are not solved on a frequency-by-frequency basis. In the earlier EIBEM, the source strength and directivity associated with the energy sources, distributed over enclosure boundaries, were determined in an iterative manner and the directivity was limited to three terms of a Fourier expansion. Here, the original method is improved by eliminating the iteration and allowing for an unlimited number of terms in the Fourier expansion of the directivity function. For verification, the improved EIBEM is compared to experimental measurements and exact analytical solutions; excellent agreement is obtained. © IMACS.

Duke Scholars

Published In

Journal of Computational Acoustics

DOI

ISSN

0218-396X

Publication Date

March 1, 2005

Volume

13

Issue

1

Start / End Page

99 / 125

Related Subject Headings

  • Acoustics
  • 4901 Applied mathematics
  • 0913 Mechanical Engineering
  • 0203 Classical Physics
  • 0102 Applied Mathematics
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Rouse, J., & Franzoni, L. (2005). Improvement of a high-frequency broadband energy-intensity boundary element method to include high resolution specular reflection. Journal of Computational Acoustics, 13(1), 99–125. https://doi.org/10.1142/S0218396X05002542
Rouse, J., and L. Franzoni. “Improvement of a high-frequency broadband energy-intensity boundary element method to include high resolution specular reflection.” Journal of Computational Acoustics 13, no. 1 (March 1, 2005): 99–125. https://doi.org/10.1142/S0218396X05002542.
Rouse, J., and L. Franzoni. “Improvement of a high-frequency broadband energy-intensity boundary element method to include high resolution specular reflection.” Journal of Computational Acoustics, vol. 13, no. 1, Mar. 2005, pp. 99–125. Scopus, doi:10.1142/S0218396X05002542.
Journal cover image

Published In

Journal of Computational Acoustics

DOI

ISSN

0218-396X

Publication Date

March 1, 2005

Volume

13

Issue

1

Start / End Page

99 / 125

Related Subject Headings

  • Acoustics
  • 4901 Applied mathematics
  • 0913 Mechanical Engineering
  • 0203 Classical Physics
  • 0102 Applied Mathematics