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New Perspectives in the Study of Noise Quality in Vehicles
Technical Paper
95A097
Sector:
Language:
English
Abstract
One of the features which nowadays tends to assume more and more
importance, once a customer decides to buy a new car, is its
"acoustic image".
We observe that it is going to be no longer sufficient to keep
the noise emitted by a vehicle simply below
"quantitative" thresholds. The sound coming from the
various sources in the car must be "shaped" according to
subjective criteria too, ensuring pleasantness and correct
information contents about the working status of the source
itself.
A vehicle has to be considered as an "ensemble" of
interacting acoustic sources, which add up to build its final aural
perception. Furthermore these sound "messages" interact
in a complex way with the other sensory channels of the user, and
it is very likely that their meaning may be perceived in a
different manner in different situations, and according to the
different role of the listener (i.e. the driver, who having an
active role in the noise generation process, needs an information
feedback from the produced noise, and the passenger, whose role is
mainly that of a passive listener).
Thus it seems that new perspectives are needed to study noise
quality in cars, stemming from the idea that all of these
interactions must be taken into account simultaneously.
In other words we must aim to an optimal coherence among
different noise sources and with the global image of the automotive
product, which has to be tailored according to its particular
market destination.
It becomes necessary to make use of "reality
simulation" techniques, for reducing time and resource efforts
while aiming towards the definition of optimal "acoustical
targets" in designing new engineering solutions.
This paper deals with a possible methodological structure of
these ideas, and some application examples will be given to clarify
their inherent power.