Molded fiberglass hood insulators (hoodliners) and engine side dash insulators (dashliners) are widely applied in vehicles for noise control. These absorptive components reduce reverberant “build-up” in the engine compartment and thus cut the noise transmission into the passenger compartment. Due to restrictions of underhood space, the hood and dash insulators normally have limited thickness (under 1.5 inches), which results in inadequate noise absorption coefficient in mid and low frequencies (100Hz - 2000 Hz), where the peak of engine compartment noise spectrum exists.It is known that covering the porous absorptive panel (at the noise incident surface) with an impermeable membrane will increase the mid-low frequency absorption coefficient of the panel at the cost of some high frequency absorption coefficient loss.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Sound Absorption Performance of Membrane Covered Insulators


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Shao, Geoffrey (Autor:in) / Hughes, Tony (Autor:in) / Billy, Trevor (Autor:in)

    Kongress:

    SAE 2001 Noise & Vibration Conference & Exposition ; 2001



    Erscheinungsdatum :

    30.04.2001




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch






    FOAMED MOLDED ARTICLE, MANUFACTURING METHOD THEREOF, AND COVERED SOUND SOURCE

    HAYAKAWA DAIKI | Europäisches Patentamt | 2022

    Freier Zugriff

    AUTOMOTIVE HEADLINER WITH ENHANCED SOUND ABSORPTION PERFORMANCE

    Europäisches Patentamt | 2025

    Freier Zugriff

    Sound absorption cover

    TOMIYAMA KOJI / ONISHI KAZUYOSHI / ADACHI YUHEI et al. | Europäisches Patentamt | 2022

    Freier Zugriff