A simple technique to measure the airborne noise in a vehicle cabin has been proposed using substitution source method. A cone loudspeaker was employed as the substitution source to measure the airborne transfer function. The airborne noise can be separated from the total transmission with the intersection frequency at 400 Hz. This transition frequency is also found to be independent of the speed of the engine. Separation of this transmission path is useful as a measure of the noise control treatment, for example the quality of the sealing of gaps or leakages at the bulkhead for the airborne path. In the experiment, the loudspeaker used produces low sound energy. To obtain a more accurate 'transmission loss' transfer function, it is suggested to employ a source producing greater sound energy particularly at high frequencies for sound to penetrate the vehicle cabin optimally. The measurement can also be conducted in a special room such anechoic chamber to avoid unwanted background noise. For an advanced measurement, this can be conducted using the engine noise simulator which resembles the noise emitted from the real engine.


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    Titel :

    On a simple technique to measure the airborne noise in a car interior using substitution source


    Beteiligte:
    Putra, Azma (Autor:in) / Munir, Fudhail A. (Autor:in) / Juis, Clinton D. (Autor:in)


    Erscheinungsdatum :

    2012


    Format / Umfang :

    13 Seiten, 13 Bilder, 22 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





    On a simple technique to measure the airborne noise in a car interior using substitution source

    Putra,A. / Munir,F.A. / Juis,C.D. et al. | Kraftfahrwesen | 2012


    Airborne road noise source definition

    Taylor,N.C. / Bridgewater,A.P. / Austin Rover Group,Canley,GB et al. | Kraftfahrwesen | 1998


    Airborne road noise source definition

    Taylor, N. C. / Bridgewater, A. P. / IMechE; Automobile Division | British Library Conference Proceedings | 1998