The typical goal of most sound absorbing materials is to maximize the sound absorption for a given thickness, weight and cost. In this study, tests were conducted on an example polyester fiber sound absorber pad to establish baseline acoustical performance and to extract poro-elastic material properties, which were then used to computer model the acoustical performance of this material. Good agreement was obtained for the measured and predicted sound absorption for the base fiber material. Opportunities to improve the performance of this material were then investigated using computer models of various acoustically-tuned facings in combination with the base pad. The results show how overall sound absorption can be improved and how the frequency dependent performance can be tuned to meet specific requirements. These designs leverage the effectiveness of low cost fiber constructions with the high performance of engineered facings to achieve value added acoustical products that are critical to noise control applications in the automotive industry.


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    Title :

    Optimization of Sound Absorbers Using Resistive Facings


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2009 Noise and Vibration Conference and Exhibition ; 2009



    Publication date :

    2009-05-19




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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