Skip to main content

Objective Evaluation of Interior Car Sound

Objective



Whenever a product is used in daily life, it emits a
specific sound. This sound can be regarded as a specific
kind of language which the product employs to tell the
user something about itself, e.g., its position, its
task, its status of operation, and its quality. In
addition that sound contributes significantly to the
"character" of a product. A customer who has the choice
between several products will thus strongly be influenced
in his decision by the product sound. In the daily use of
the product the sound will significantly contribute to
the satisfaction of the user.

An effective and optimal design of product sounds has
been hindered until now by the fact that the structures
of the specific product "languages" are not yet
understood. The most prominent branch confronted with
this problem is one of Europe's most important industries
car manufacturers. Thus the overall goal of OBELICS is to
develop methods for an objective evaluation of car
sounds.

As a result of OBELICS, new methods and tools for sound
design and sound engineering will be made available.
These new tools and methods will lead to a more effective
development process and to more sophisticated products.
Firstly, the development process of new cars will be
speeded up, and, due to the availability of target sounds
for specific car categories and advanced design methods,
the process of sound design can be better integrated into
the early development phase of cars.

To do so, partners will explore auditory perceptual
spaces set up from interior noises of passenger cars
and identify and validate descriptors as used by
psychoacousticians, car makers, and customers to describe
and to scale parameters of these spaces. To this end,
multidimensional scaling and factor analysis procedures
will be applied to auditory judgements produced by a pool
of representative listeners. Auditory descriptors as used
by car makers and customers in this regard will be
identified through interviews and be validated via
perceptual polarity profiles. A cross comparison with
psychoacoustic parameters will be performed.

The results of the perceptual investigations will be
correlated with physical indicators. This important step
builds the bridge between perception and physics: signal
analysis methods will be developed which allow for a
prediction of perceptual attributes. Based on these
methods new and advanced tools for sound design will be
developed. These tools will enable manufactures and
related industries to manipulate sounds in a controlled
manner in order to approach the ideal sound.

Several optimization strategies for dedicated
applications of sound design will be tackled in parallel
to the above described global research stream. These
applications directly consider actual needs of
manufacturers and will secure that the project has direct
impact on the development process and the resulting
products.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

HEAD ACOUSTICS GMBH
Address
Ebertstraße 30A
Herzogenrath
Germany

Participants (6)

AVL - List GmbH - Gesellschaft für Verbrennungskraftmaschinen und Messtechnik GMBH
Austria
Address
48,Kleiststrasse
8020 Graz
Centro Ricerche Fiat SCpA
Italy
Address
Strada Torino 50
10043 Orbassano Torino
Leuven Measurements and Systems (International) Numeral Technologies BV
Belgium
Address
68,Interleuvenlaan
3001 Heverlee
REGIENOV - RENAULT RECHERCHE ET INNOVATION
France
Address
9,Avenue Du Golf 1
78288 Guyancourt
Ruhr-Universität Bochum
Germany
Address
150,Universitätsstraße
44780 Bochum
UNIVERSITY OF OLDENBURG
Germany
Address
Carl Von Ossietzky Stra¯e 9-11
26111 Oldenburg