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Transmission Loss Measurement with and without an Anechoic Termination
Technical Paper
2009-01-2035
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The definition method and the two load/source method of a transmission loss test of an automotive tuning device are discussed in this paper. For the definition method, the accuracy penalty due to the imperfect anechoic termination quality is studied based on an empirical acoustic model of glass-wool and the best practice of constructing an anechoic termination is attempted. The conclusion is verified with numerical simulations. For the two load/source method, the difference in the two source/load impedances compounded with the error of measured acoustic pressures, as related to transmission loss accuracy, is discussed and demonstrated.
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Citation
Zheng, S. and Kleinfeld, C., "Transmission Loss Measurement with and without an Anechoic Termination," SAE Technical Paper 2009-01-2035, 2009, https://doi.org/10.4271/2009-01-2035.Also In
References
- Munjal, M.L. Acoustics of Ducts and Mufflers with Application to Exhaust and Ventilation System Design John Wiley and Sons 1987
- Delany. M.A. Bazley, E.N. “Acoustic properties of fibrous absorbent materials,” Applied Acoustics 3 1970 105 116
- Bies, D.A. Hansen, C.H. “Acoustical properties of fibrous absorbent materials,” Applied Acoustics 14 1980 357 391
- COMSOL Multiphysics User's Guide COMSOL AB October 2007
- Tao, Z. Seybert, A.F. “A Review of Current Techniques for Measuring Muffler Transmission Loss,” SAE Technical Paper 2003-01-1653 Noise & Vibration Conference and Exhibition Traverse City, Michigan May 5-8 2003
- Lung, T.Y. Doige, A.G. “A time-averaging transient testing method for acoustic properties of piping systems and muffler with flow,” Journal of the Acoustical Society of America 73 March 1983 867 876
- Pierce, Allan D. Acoustics An Introduction to Its Physical Principles and Applications the Acoustical Society of America 1991