EXPERTISE IN ELECTRIC MOBILITY - page 138

137
the sound of e-moBility
Fraunhofer Institute for
Building Physics IBP
Nobelstrasse 12
70569 Stuttgart, Germany
Year of establishment:
1929
Employees:
200 (2012)
Turnover:
EUR 25 million (2012)
Contact
Prof. Dr.-Ing. Philip Leistner
Phone: +49 711 970 3314
Fax: +49 711 970 3406
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 compo-
nents, and the vehicle as a whole. Main research
encompasses the study of driver and passenger
perception and acceptance of electric vehicles
and its influence, as well as e-mobility’s effect
on the environment. Fierce debate surrounds
the problems associated with pedestrians fail-
ing 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 vibra-
tions 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, dif-
ferent drive types (for example, wheel hub mo-
tors) 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.
NVH analysis and sound design for best vehicle acoustics
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