This content is not included in your SAE MOBILUS subscription, or you are not logged in.
System for Augmenting the In-Cabin Sound of Electric Vehicles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 05, 2017 by SAE International in United States
Annotation ability available
Excitement, image and emotion are key attributes for cars, particularly those with higher power ratings. Engine sound has traditionally acted as the car’s voice, conveying these attributes to the driver and passengers along with the brand image. Engine sound also underpins the dynamic driving experience by giving instant feedback about how a car is operating, enhancing the connection between driver and vehicle. For decades, the automotive industry has engineered engine sound to achieve these benefits, thereby defining the ‘language’ of car sound.
Electric vehicles deliver strong and responsive performance but naturally lack the acoustic feedback that internal combustion engines provide. While this gives advantages in terms of comfort and environmental noise, the benefits of engine sound are lost. Carefully controlled acoustic feedback inside the car’s cabin brings tangible and valuable benefits both for the dynamic driving experience and to convey the brand image. A key emerging challenge is to provide acoustic augmentation whilst maintaining a degree of integrity and authenticity.
A new system fulfils the need for in-cabin sound in electric vehicles. It powerfully enriches the dynamic driving experience and is highly adjustable to match and enhance any brand image. Sounds are sourced from acoustic inputs from the electric drive, providing a perceived authenticity, driver connection and organic load dependency not afforded conveyed by purely synthetic systems. Acoustic comfort is maintained during cruising (and in the environment) while brand sound and driver feedback are provided during more spirited driving. Additional processing delivers a wide range of sound qualities from which the most appropriate brand sound can be selected, and offers a range of feedback tuning options that can be applied in different driving modes. Playback through a loudspeaker system is blended into the natural sound field. The system enables the definition and development of electric vehicle sounds in a live driving context.
CitationMaunder, M. and Munday, B., "System for Augmenting the In-Cabin Sound of Electric Vehicles," SAE Technical Paper 2017-01-1757, 2017, https://doi.org/10.4271/2017-01-1757.
- Wenzel, W., Alex, M., “Symposer - Sound Design für aufgeladene Motoren,” 26. Internationales Wiener Motorensymposium, Wien, 2005
- BMW press release 8 October 2009, “BMW Group Media Information, 10/2009, Innovation Days 2009 - Interior, Infotainment, Mobility,” pp 35-41, https://www.press.bmwgroup.com/global/download.html?textId=151366&textAttachmentId=184563
- Schirmacher, R., "Active Noise Control and Active Sound Design - Enabling Factors for New Powertrain Technologies," SAE Technical Paper 2010-01-1408, 2010, doi:10.4271/2010-01-1408.
- Park, D., Jo, E., Hong, S., and Csakan, M., "Development of Personalized Engine Sound System using Active Sound Design Technology," SAE Int. J. Passeng. Cars - Mech. Syst. 8(3):862-867, 2015, doi:10.4271/2015-01-2216.
- Maunder, M., Grant, P., and Mawdsley, D., "System for Realistic Augmentation of Sporty Engine Sound Quality," SAE Technical Paper 2016-01-1781, 2016, doi:10.4271/2016-01-1781.
- International Energy Agency publication, “Global EV Outlook 2016”, 2016, https://www.iea.org/publications/freepublications/publication/Global_EV_Outlook_2016.pdf
- Shiosaki, H., Iwanaga, Y., Hideki, I., and Takahashi, Y., “Interior Noise Evaluation of Electric Vehicles - Noise Source Contribution Analysis”, SAE Technical Paper 2011-39-7229, 2011.
- Brandl, S. and Graf, B., “Sound Engineering for Electric and Hybrid Vehicles - Procedures to Create Appropriate Sound For Hybrid and Electric Vehicles”, SAE Technical Paper 2011-39-7228, 2011.
- Sarrazin, M., Janssens, K., and Van der Auweraer, H., "Virtual Car Sound Synthesis Technique for Brand Sound Design of Hybrid and Electric Vehicles," SAE Technical Paper 2012-36-0614, 2012, doi:10.4271/2012-36-0614.
- Poxon, J., Jennings, P., Allman-Ward, M., “Development of a hybrid electric vehicle (HEV) model for interactive customer assessment of sound quality”, Hybrid & Eco Friendly Vehicles Conference 2008 (HEVC 2008), 2008
- Genuit, K., “Acoustics of alternative drives in the context of comfort, emotion and brand differentiation”, 13th Stuttgart International Symposium - Automotive and Engine Technology 2013, pp 605-619, 2013
- Engeler, O., Hofmann, M., Mikus, R., Hirrle, T., “Mercedes-Benz SLS AMG Coupé Electric Drive NVH development and sound design of an electric sports car,” Proceedings 15. Internationales Stuttgarter Symposium, pp 1295-1309, 2015, doi: 10.1007/978-3-658-08844-6_90
- Govindswamy, K. and Eisele, G., "Sound Character of Electric Vehicles," SAE Technical Paper 2011-01-1728, 2011, doi:10.4271/2011-01-1728.
- Fortino, A., Eckstein, L., Viehöfer, J., and Pampel, J., "Acoustic Vehicle Alerting Systems (AVAS) - Regulations, Realization and Sound Design Challenges," SAE Int. J. Passeng. Cars -Mech. Syst. 9(3):995-1003, 2016, doi:10.4271/2016-01-1784.
- Gillibrand, A., Suffield, I., Vinamata, X., Williams, R. et al., "An Initial Study to Develop Appropriate Warning Sound for a Luxury Vehicle Using an Exterior Sound Simulator," SAE Technical Paper 2011-01-1727, 2011, doi:10.4271/2011-01-1727.
- Vegt, E., "Designing Sound for Quiet Cars," SAE Technical Paper 2016-01-1839, 2016, doi:10.4271/2016-01-1839.
- Puckette, M., “The Theory and Techniques of Electronic Music”, WSPC, 2007, pp204-209
- Chowning, J., “The Synthesis of Complex Audio Spectra by Means of Frequency Modulation”, Journal of the Audio Engineering Society, 21(7):526-534
- Maunder R M S, “An Interactive Subjective Assessment Method For Recorded Sound,” Institute of Mechanical Engineers, 1998, Paper C521/022/98