Acoustical Advantages of a New Polypropylene Absorbing Material

Paper #:
  • 1999-01-1669

Published:
  • 1999-05-17
Citation:
Ernster, S., Tudor, J., and Kathawate, G., "Acoustical Advantages of a New Polypropylene Absorbing Material," SAE Technical Paper 1999-01-1669, 1999, https://doi.org/10.4271/1999-01-1669.
Pages:
7
Abstract:
Sound absorption is one way to control noise in automotive passenger compartments. Fibrous or porous materials absorb sound in a cavity by dissipating energy associated with a propagating sound wave. The objective of this study was to evaluate the acoustic performance of a cotton fiber absorbing material in comparison to a new polypropylene fibrous material, called ECOSORB ®. The acoustical evaluation was done using measurements of material properties along with sound pressure level from road testing of a fully-assembled vehicle.The new polypropylene fibrous material showed significant advantages over the cotton fiber materials in material properties testing and also in-vehicle measurements. In addition to the performance benefits, the polypropylene absorber provided weight savings over the cotton fiber material.
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