Quieter cars such as electric vehicles (EVs) and hybrid electric vehicles (HEVs) may reduce auditory cues used by pedestrians to assess the state of nearby traffic and, as a result, their use may have an adverse impact on pedestrian safety. In order to document differences in the sound levels of HEVs and internal combustion engine (ICE) vehicles, the authors measured the sound pressure level in one-third octave bands of three HEV and three corresponding ICE vehicles for the following operating conditions: idle, backing up at 5 mph; approaching at a constant speed (6, 10, 20, 30, and 40 mph); accelerating from stop, and slowing from 20 to 10 mph at 3.28 ft/s2. Sound level results comparing the HEVs and ICEs are presented. In general, HEVs have lower sound levels than ICEs for operating conditions below 20 mph, but above 20 mph, the sound from road-tire interactions dominates and the sound levels of the two vehicle types converge.


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    Titel :

    Acoustic Characteristics of Hybrid Electric Vehicles and the Safety of Pedestrians Who are Blind


    Beteiligte:
    A. Hastings (Autor:in) / C. Scarpone (Autor:in) / B. Samiljan (Autor:in) / L. Garay-Vega (Autor:in) / J. K. Pollard (Autor:in)

    Erscheinungsdatum :

    2010


    Format / Umfang :

    17 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Acoustic Characteristics of Hybrid Electric Vehicles and Safety of Blind Pedestrians

    Hastings, Aaron / Scarpone, Chris / Samiljan, Bob et al. | Transportation Research Record | 2011



    Auditory Detectability of Hybrid Electric Vehicles by Blind Pedestrians

    Garay-Vega, Lisandra / Pollard, John K. / Guthy, Catherine et al. | Transportation Research Record | 2011



    Auditory Detectability of Hybrid Electric Vehicles by Pedestrians Who Are Blind

    L. Garya-Vega / J. K. Pollard / C. Guthy et al. | NTIS | 2010