It is known acoustic comfort is a key feature to meet customer expectations for many products. In the current automotive industry, vehicle interior quietness is seen as one of the most important product attributes regarding perceived quality. A quiet interior can be achieved through an appropriate balance of noise sources levels and acoustic materials. However, the choice of the most efficient acoustic content may be challenging under severe cost and mass restraints commonly found in emerging market vehicles. Therefore, it is fundamental to develop efficient materials which will provide high acoustic performance with lower weight and cost. In this paper the fine tuning of the headliner structure is presented as an efficient way to increase acoustic performance. Structures currently employed for this vehicle subsystem are described. Airflow resistance and sound absorption measurements are used to guide development and make precise manufacturing process changes. It is shown that the new headliner structure, which is a low cost and lightweight solution, can strongly contribute to interior noise reduction.


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    Title :

    Vehicle Interior Noise Reduction Using Innovative Roof Trim Structure


    Additional title:

    Sae Technical Papers



    Conference:

    SAE Brasil International Noise and Vibration Colloquium 2014 ; 2014



    Publication date :

    2014-11-04




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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