This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Acoustical Study of Micro- Perforated Plates for Vehicle Applications
Technical Paper
2009-01-2037
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Micro-perforated plate (MPP) absorbers are perforated plates with holes typically in the sub mm range and perforation ratios around 1%. The values are typical for applications in air at standard temperature and pressure (STP). The underlying acoustic principle is simple, it is to create a surface with a built in damping which effectively absorbs sound waves. To achieve this, the acoustic impedance of a MPP absorber is normally tuned to be of the order of the characteristic wave impedance in the medium (~ 400 Pa*s/m in air at STP). The traditional application for MPP absorbers has been building acoustics often combined with a so called panel absorber, to create an absorption peak at a selected frequency. However, MPP absorbers made of metal could also be used for noise control close to or at the source in many vehicle applications.
Recommended Content
Authors
Citation
Allam, S., Guo, Y., and Åbom, M., "Acoustical Study of Micro- Perforated Plates for Vehicle Applications," SAE Technical Paper 2009-01-2037, 2009, https://doi.org/10.4271/2009-01-2037.Also In
References
- Maa D.-Y. Potential of microperforated panel absorber Journal of Acoustical Society of America 104 5 July 1998
- Maa D.-Y. “Theory and design of micro perforated-panel sound-absorbing construction” Sci. Sin 55 71 1975
- Maa D-Y “Microperforated panel at high sound intensity” Proc. internoise 1994
- Maa D.-Y Basic theory of acoustics Beijing 2003
- Rayleigh Lord Theory of Sound II MacMillan New York 1929 327
- Crandall I.B. Theory of Vibration System and Sound Van Nostrand New York 1926 229
- Ingard U. “On the theory and design of acoustics resonators” Journal of the Acoustical Society of America 25 1044 1953
- Sivian L.J. “Acoustic Impedance of Small Orifices” Journal of the Acoustical Society of America 7 1935
- Ahuja K.K. Gaeta R. J. Jr. “Active Control of Liner Impedance by Varying Perforate Orifice Geometry” Georgia Institute of Technology Atlanta, Georgia
- Ingard U. Ising H. “Acoustic nonlinearity of an orifice” Journal of the Acoustical Society of America 42 6 17 1967
- Allard J.F. “Propagation of sound in porous media modeling sound absorbing materials” London Elsevier Applied Science, cop. 1993
- Åbom M. “Determination of Porous Material Data Via Two-Port Measurements”
- Allam S. Åbom M. “Experimental Characterization of Acoustic Liners with Extended Reaction” 14 th AIAA/CEAS Conference 2008-3074
- Guo Y. Allam S. Åbom M. “Micro-Perforated Plates for Vehicle Application” 37 th International Congress and Exposition on Noise Control Engineering October 26 – 29 2008 Shanghai, China
- Guo, Y “Acoustics of micro-perforated plates”
- www.sidlab.se