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Design and Acoustic Performance of Baffles Based on Programmed Heat-activated Foams
Technical Paper
1999-01-1673
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A programmed heat-activated foam technology has recently been introduced for making baffles to seal hollow car body channels[1,2]. First, we summarize the key characteristics of the programmed foams. Some unique design features such as maximum gap to allow easy E-coat drainage, multiple section design for complex channels, allowance for passage of drainage hose and double-layered baffle are presented.
Then, we examine the important design parameters affecting the acoustic performance of baffles based on the programmed foams. The insertion loss(IL) was measured for various baffles expanded in a test channel. The effects of foam expansion ratio, surface density, etc., on the acoustic performance of various single-layered and double-layered baffles are reported.
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Citation
Chang, R., Biche, B., and Chiotis, A., "Design and Acoustic Performance of Baffles Based on Programmed Heat-activated Foams," SAE Technical Paper 1999-01-1673, 1999, https://doi.org/10.4271/1999-01-1673.Also In
References
- Chang, R. J. Dawes, K. Schwartz, L. D. “Expandable Foams with Programmed Expansion as Body Cavity Filler,” SAE Paper 980590 SAE Congress and Exposition Detroit, Michigan February 23-26 1998
- Chang, R. J. Dawes, K. Schwartz, L. D. Fick, R. “Acoustic Double Baffle Utilizing Programmed Expandable Foam as Body Cavity Seal,” Paper C521/003/98 European Noise and Vibration Conference, Institute of Mechanical Engineers London, England May 11-13 1998
- Saha, P. Myers, R. D. “Importance of Sealants for Interior Noise Control of Automobiles,” Paper 920412 SAE International Congress & Exhibition Detroit, Michigan February 24-28 1992
- Wentzel, R. E. Saha, P. “Empirically Predicting the Sound Transmission Loss of Double-Wall Sound Barrier Assemblies,” SAE Paper 951268 1995
- Saha, P. Myers, R. D. “Evaluating Acoustical Performance of Expandable Sealant Materials,” SAE Paper 930336 1993
- Saha, P. “The Need of a Standardized Acoustical Evaluation Method for Body Cavity Fillers,” SAE IBEC(International Body Engineering Conference) Detroit, Michigan October 31 November 2 1995
- Visintainer, A. P. Saha, P. “Acoustical Study of Cavity Fillers for Vehicle Applications,” Paper 971931 SAE Noise & Vibration Conference & Exposition Traverse City, Michigan May 20-22 1997
- Otto, D. J Hanley, J. L. “From Art to Science: A New Acoustic Baffle Material,” Paper 951245 SAE Noise and Vibration Conference ‘Traverse City, MI. 95 101 May 15-18 1995