Electric vehicles offer the advantage to be cleaner and more silent than vehicles equipped with an internal combustion engine. Especially in the area of low speeds, electric vehicles are missing a significant load and speed dependency regarding their noise emissions. On the one hand, the reduced noise level of electric vehicles is a chance to improve the inner-city noise pollution. On the other hand, the silent transportation entails risks for surrounding pedestrians and cyclists due to the lack of tire-road noise at speeds below 30 km/h. The noise emitted by the electric vehicle is easily masked by the urban background noise. Therefore, the legislation is currently working on guidelines in terms of an exterior noise required for detecting electric vehicles. With the implementation of a synthetic driving sound, the perceived interior noise has to be considered to satisfy the customer demand for an appealing driving experience, as well. For the solution of this task, a synthetic sound generation system has been developed by the Institute of Automotive Engineering (Institut für Kraftfahrzeuge, ika), RWTH Aachen University, Germany. Besides the realization of executable software to enable real-time capable CAN communication and sound calculation, an implementation on an in-vehicle control unit has been designed. Special attention has been paid to the aspect "ease of use". Important control parameters of the synthetic sound design can be modified on a tablet with a graphical user interface directly in a road test in the test vehicle. Finally, the interior and exterior noises have been analyzed with regard to the audibility and sound quality by operating the sound system in an electric vehicle. The methodology of the synthetic sound generation and key results are object of this report.


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    Titel :

    Sound design and implementation methods for synthetic driving sounds in electric vehicles


    Beteiligte:


    Erscheinungsdatum :

    2014


    Format / Umfang :

    11 Seiten, Bilder, 10 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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