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.
Acoustical Advantages of a New Polypropylene Absorbing Material
Sae Technical Papers
Noise & Vibration Conference & Exposition ; 1999
1999-05-17
Aufsatz (Konferenz)
Englisch
Passenger compartments , Pressure , Fibers , Acoustics , Noise , Road tests
Acoustical advantages of a new polypropylene absorbing material
Kraftfahrwesen | 1999
|Acoustical characterisation of porous sound absorbing materials: a review
Online Contents | 2014
|Polypropylene Batteries - Product Characteristics and Advantages
SAE Technical Papers | 1968
|Acoustical characterisation of porous sound absorbing materials: a review
Kraftfahrwesen | 2014
|