THE SOUND OF E-MOBILITY
Electric vehicle acoustics research is central at the Department of Acoustics of the Fraunhofer Institute for Building Physics. The focus is on psychoacoustics and mechanisms for managing the sound and vibration of individual components, and the vehicle as a whole. Main research encompasses the study of driver and passenger perception and acceptance of electric vehicles and its uence, as well as e-mobilitys effect on the environment. Fierce debate surrounds the problems associated with pedestrians failing to notice electric cars, particularly in busy inner-city areas. However, integrating audible signals, to warn both occupants and others, is one possible answer. New types or substitute components deployed in e-vehicles generate different kinds of sounds. As the usually dominant noise from a combustion engine is no longer present, sounds and vibrations created by auxiliary units and other parts not associated with the power-train are per-ceived differently. Wind and tyre noise will play a more significant role in e-vehicles than is the case with conventional vehicles. Moreover, different drive types (for example, wheel hub motors) open up new possibilities in vehicle design. These in turn give rise to new ideas for insulating sound and vibration, and for interior acoustics. Vehicle acoustics is an important and complex field that must be taken into account if e-mobility is to become a sustainable, long-term success.