Design and Acoustic Performance of Baffles Based on Programmed Heat-activated Foams

1999-01-1673

05/17/1999

Event
Noise & Vibration Conference & Exposition
Authors Abstract
Content
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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DOI
https://doi.org/10.4271/1999-01-1673
Pages
8
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.
Additional Details
Publisher
Published
May 17, 1999
Product Code
1999-01-1673
Content Type
Technical Paper
Language
English