Several windshield constructions are designed and tested for the objectives of weight savings and improved vehicle wind noise. They include standard windshield constructions representing typical production windshields installed on most vehicles today, and acoustic windshield constructions of different glass thickness with weight saving and NVH improvement as the design objectives. The acoustic windshields contain an acoustically enhanced polyvinyl butyral (PVB) interlayer, Vanceva™ Quiet. The windshield constructions are tested for transmission of external airborne noise in laboratory and wind noise and road noise on high-speed test tracks. Laboratory study shows significant opportunities for both improved acoustics in 1500 Hz to 6000 Hz frequency region - a key range for wind noise and airborne noise transmission - and weight savings. Full scale NVH testing on high-speed tracks at 80 to 160 kmph shows that acoustic windshields made with the same production glass as the standard windshields reduce vehicle wind noise by as much as 6 dB. Testings with a thinner and lighter acoustic windshield reveal that the windshield improves vehicle wind noise by as much as 3-4 dB, at a 15% weight saving.While thinner and lighter windshield has recently been the trend in automotive glazing for significant weight savings, it has also been the NVH limitation to designing quieter car interior. The present study indicates that the windshield can be designed and made quieter with the acoustically enhanced PVB interlayer.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Design of Windshields with New PVB Interlayer for Enhanced Noise Reduction and Weight Savings


    Additional title:

    Sae Technical Papers


    Contributors:
    Lu, Jun (author)

    Conference:

    International Body Engineering Conference & Exposition ; 2003



    Publication date :

    2003-10-27




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Windshields With New PVB Interlayer for Vehicle Interior Noise Reduction and Sound Quality Improvement

    Pyper, Jay / Fisk, Jonathan / Lu, Jun et al. | SAE Technical Papers | 2003



    HEATABLE WINDSHIELDS

    MA ZHIXUN / POLCYN ADAM D / WAGNER ANDREW | European Patent Office | 2020

    Free access

    Coming:Safer windshields

    Automotive engineering | 1983


    HEATABLE WINDSHIELDS

    MA ZHIXUN / POLCYN ADAM / WAGNER ANDREW | European Patent Office | 2021

    Free access