Numerical and analytical solutions for sound propagation and absorption in porous media at high sound pressure levels.
J Acoust Soc Am
; 132(3): 1436-49, 2012 Sep.
Article
in En
| MEDLINE
| ID: mdl-22978873
ABSTRACT
On the basis of the work of Wilson et al. [J. Acoust. Soc. Am. 84, 350-359 (1988)], a more exact numerical approach was constructed for predicting the nonlinear sound propagation and absorption properties of rigid porous media at high sound pressure levels. The numerical solution was validated by the experimental results for sintered fibrous porous steel samples and its predictions were compared with the numerical solution of Wilson et al. An approximate analytical solution was further put forward for the normalized surface acoustic admittance of rigid air-saturated porous materials with infinite thickness, based on the wave perturbation method developed by Lambert and McIntosh [J. Acoust. Soc. Am. 88, 1950-1959 (1990)]. Comparisons were made with the numerical results.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Sound
/
Acoustics
/
Computer Simulation
/
Numerical Analysis, Computer-Assisted
/
Models, Theoretical
Type of study:
Prognostic_studies
Language:
En
Journal:
J Acoust Soc Am
Year:
2012
Document type:
Article