This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Optimization of Sound Absorbers Using Resistive Facings
Technical Paper
2009-01-2137
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The typical goal of most sound absorbing materials is to maximize the sound absorption for a given thickness, weight and cost. In this study, tests were conducted on an example polyester fiber sound absorber pad to establish baseline acoustical performance and to extract poro-elastic material properties, which were then used to computer model the acoustical performance of this material. Good agreement was obtained for the measured and predicted sound absorption for the base fiber material. Opportunities to improve the performance of this material were then investigated using computer models of various acoustically-tuned facings in combination with the base pad. The results show how overall sound absorption can be improved and how the frequency dependent performance can be tuned to meet specific requirements. These designs leverage the effectiveness of low cost fiber constructions with the high performance of engineered facings to achieve value added acoustical products that are critical to noise control applications in the automotive industry.
Recommended Content
Technical Paper | Density Optimization of Underhood Sound Absorber Applications |
Technical Paper | Numerical and Experimental Acoustic Analysis of Dissipative Silencers |
Technical Paper | Headliner Absorption Parameter Prediction and Modeling |
Authors
Citation
Wyerman, B., Bliton, R., and Dinsmore, M., "Optimization of Sound Absorbers Using Resistive Facings," SAE Technical Paper 2009-01-2137, 2009, https://doi.org/10.4271/2009-01-2137.Also In
References
- Stieger, Philip J. “Insulating and Acoustical Covering” 1942 1944
- Biot, M.A. “The theory of propagation of elastic waves in a fluid saturated porous solid,” J. Acoust. Soc. Amer. 28 168 191 1956
- Champoux Y. Allard J.-F. “Dynamic tortuosity and bulk modulus in air-saturated porous media” J. Appl. Phys 70 1975 1979 1991
- Allard, J.-F. “Propagation of sound in porous media: modeling sound absorbing materials,” Elsevier New York 1993
- Atalla N. Panneton R. Debergue P. “A mixed displacement-pressure formulation for poroelastic materials,” J. Acoust. Soc. Amer. 104 3 1444 1452 1998
- Atalla, N. Hamdi, M. A. Panneton, R. “Enhanced weak integral formulation for the mixed (u,p) poroelastic equations,” J. Acoust. Soc. Amer. 109 6 3065 3068 2001
- Atalla Y. Panneton R. Atalla N. “Measurement of the acoustic properties of open porous materials using an impedance tube,” 2nd AutoSEA User's Conference Detroit, Michigan April 2002
- ASTM E1050 - 08 “Standard Test Method for Impedance and Absorption of Acoustical Materials Using A Tube, Two Microphones and A Digital Frequency Analysis System,” ASTM International West Conshohocken, PA
- Allard, Jean F. Champoux, Y. Depollier, C. “Modelization of layered sound absorbing materials with transfer matrices,” J. Acoust. Soc. Amer. 82 1792 1987
- ASTM C423 Rev A “Standard Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method,” ASTM International West Conshohocken, PA