We investigated a pure time-domain version of source-pathcontribution analysis using a controllable source, a noise and vibration simulator installed into a trimmed vehicle. We examined both airborne and structure-borne inputs, and used the matrix method in the time-domain to calculate source contributions as sounds at a listeners' position inside the cabin. Operating data from a simulated run-up/run-down and sets of transfer functions (FRFs) are used first to estimate the strength ofsome defined point sources, both acoustically and mechanically. Second, the operating source strengths are combined with acoustic or vibro-acoustic FRFs to predict contributions at a receiver. Here we attempted to make the airborne and structure-borne models as simple as possible, and predicted contributions are validated against actual measured data. All measurements were conducted on the vehicle with and without the engine simulator installed.


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    Title :

    Engine contribution analysis using a noise and vibration simulator


    Additional title:

    Analyse des Motorlärms mitels Lärm- und Schwingungssimulator


    Contributors:

    Published in:

    Sound and Vibration ; 43 , 1 ; 16-21


    Publication date :

    2009


    Size :

    6 Seiten, 12 Bilder, 4 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English






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