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http://dx.doi.org/10.3795/KSME-A.2017.41.10.923

Detectability Evaluation for Alert Sound in an Electric Vehicle  

Han, Man Uk (Dept. of Mechanical Engineering, Inha Univ.)
Lee, Sang Kwon (Dept. of Mechanical Engineering, Inha Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.41, no.10, 2017 , pp. 923-929 More about this Journal
Abstract
Generally, the sound emitted from a vehicle powered by an electric motor is lower than that of internal combustion engine vehicles. Therefore, pedestrians often cannot detect approaching electric vehicles. Therefore, a certain additional warning sound is required for these types of automobiles. In this study, to develop an audible warning sound, nine warning sounds are designed based on signal processing and chord theory. The background noise measured on the road is also added to these synthetic sounds. The detectability of these warning sounds is evaluated by subjective tests. The sound metric is correlated to detectability and is investigated through psychoacoustic theory and subjective evaluation. It is determined that known psychoacoustic parameters such as loudness, sharpness, and roughness have a low correlation with detectability. However, it is found that the interval of harmonic sound correlates well with detectability.
Keywords
Electric Vehicle; Warning Sound; Chord; Detectability;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 Lee, S. K., Lee, S. M., Shin, T. and Han, M. U., 2017, "Objective Evaluation of the Sound Quality of the Warning Sound of Electric Vehicles with a Consideration of the Masking Effect: Annoyance and Detectability," International Journal of Automotive Technology, Vol. 18, No. 4, pp. 699-705   DOI
2 Zeitler, A., 2012, "Psychoacoustic Requirements for Warning Sounds of Quiet Cars," SAE Int. J. Passeng. Cars - Electron. Electr. Syst. Vol. 5, No. 2, pp. 572-578.   DOI
3 Hanna, R., 2009, Incidence of Pedestrian and Bicyclist Crashes by Hybrid Electric Passenger Vehicles, National Highway Traffic Safety Administration (NHTSA), DOT HS 811 204.
4 Jacobsen, G. N., Ih, J. G., Song, W. K. and Macdonald, E. N., 2016, "Predicting Detectability and Annoyance of EV Warning Sounds Using Partial Loudness," Internoise2016, pp. 1706-1715.
5 http://evader-project.eu, 2011, Electric Vehicle Alert for Detection and Emergency Response, eVADER project, FP7.
6 Haas, E.C and Casali, J. G., 1993, "The Perceived Urgency and Detection Time of Multi-tone and Frequency-Modulated Warning Signals," Proceedings of the Human Factors and Ergonomics Society Annual Meeting, Vol. 37, No. 9, pp. 554-548.
7 ISO 7029, 2000, Statistical distribution of hearing thresholds as a function of age.
8 Otto, N., Amman, S., Eaton, C. and Lake, S., 1999, "Guidelines for Jury Evaluation of Automotive Sounds," SAE Technical Paper, doi:10.4271/1999-01-1822
9 Parizet, P., Ellermeier, W. and Robart, R., 2014, "Auditory Warnings for Electric Vehicles: Detectability in Normal-vision and Visually-impaired Listeners," Applied Acoustics, Vol. 86, pp. 50-58.   DOI
10 Jones, D., 2012, Music Technology A Level, Darren Jones, Bournemouth, pp. 147-157.
11 Zwicker, E. and Fastl, H., 1999, Psychoacoustics: Facts and Models, Springer, Berlin, pp. 203-233.
12 Lee, S. K., 2016, Objective Evaluation of Sound Quality in an Electric Vehicle Based on Effect of Temporal and Spectral Masking, FISITA 2016, F2016-ETNVH-3.
13 Langford, S., 2013, Digital Audio Editing, Focal Press, Abingdon, pp. 44-57.
14 Lee, S. M. and Lee, S. K., 2013, "Psychoacoustical Analysis and Application of Electroencephalo-graphy (EEG) to the Sound Quality Analysis for Acceleration Sound of a Passenger Car," Trans. Korean Soc. Noise Vibration. Eng., Vol. 23, No. 3, pp. 258-266.   DOI
15 Bismarck, V. G., 1974, "Sharpness as an Attribute of the Timbre of Steady Sounds," Acustica, Vol. 30, No. 3, pp. 159-172.
16 Zwicker, E. and Fastl, H., 1999, Psychoacoustics: Facts and Models, Springer, Berlin, pp. 61-110.
17 Ann, Y. C., Lee, J. H. and Kim, S. H., 2014, "Interior Noise Characteristics of the Electric Trains in Gyeongchun Line," Transactions of the Korean Society of Mechanical Engineers - A, Vol. 38. No. 7, pp. 817-822.   DOI
18 Pinch, T. and Frank, T., 2004, Analog Days: The Invention and Impact of the Moog Synthesizer, Harvard University Press. ISBN 978-0-674-01617-0.