The Power Injection Method allows us to measure damping loss factors that are in the case of the rear window of the same order of magnitude than the one usually found. For the side window, the measured values seem to be overestimated. The dissipation effect of the window's seals may explain this high value. It has been showed that the number of excitation points could be limited as long as they are distributed on the whole window. Next investigation could focus on the limitation of the number of responses. About the radiating coupling loss factor estimation, the method in which microphones are used to measure the acoustic power inside the car is not suitable: free field conditions assumption is not valid and the acoustic power is overestimated. The radiating coupling loss factor is well estimated with the use of an intensity probe. One advantage of this method is that it allows to measure the acoustic power and the space average mean square velocity of the window in only one scanning. One drawback is that the measurement of acoustic power is sensitive to the reflection inside the car: thus, absorbent material has to be placed on some parts of the car. Moreover the use of the intensity probe requires some space near the studied structure in order to allow scanning. In order to avoid this problem, excitation and response sides could be inverted: a shaker installed inside the car could excite the window while the acoustic power and the velocity of the window could be measured by the intensity probe outside the car in an anechoic room.


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    Titel :

    Measurement of SEA (Statistical Energy Analysis) parameters for vehicle glasses


    Beteiligte:
    Moulet, M.H. (Autor:in) / Vergne, S. (Autor:in) / Vanherpe, F. (Autor:in) / Portier, E. (Autor:in) / Dupuy, F. (Autor:in)


    Erscheinungsdatum :

    2012


    Format / Umfang :

    6 Seiten, 12 Bilder, 5 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch




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