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Advanced technologies for the playback of sound and vibrations in vehicles
Technical Paper
1998-29-0006
Sector:
Language:
German
Abstract
While a vehicle is being driven, its passengers are exposed to
noise and vibrations. The subjective assessment of driving comfort
therefore includes the consideration of both factors. The
principles of human sound perception will be explained to elucidate
the underlying basics and the use of binaural technology in this
context will be described.
The vibro-acoustical exposure that passengers are subject to
represents a complex situation. The perception of sound is
influenced by the vibrational environment. Multi-channel
measurement systems combining binaural and
""conventional"" measurement technology allow
correlations to be determined between the passengers' exposure
and their resultant judgement.
The newly developed ""sound car"" will be
presented as an analogy to the aurally equivalent playback system
via headphones. It is a unique playback device for the sound and
vibrations of vehicles. Here, airborne sound is reproduced via
headphones, but the system also includes a subwoofer for low
frequencies. The innovative approach reproduces the vibrations felt
inside the car from the driver's seat and at the steering
wheel. This simulation of the combined factors means that during
playback the passenger is exposed to as realistic a situation as
possible. The complete setup is installed in the car body and
therefore takes into account the room-acoustical situation that
also influences the subjective judgement.
The advantages and limitations of this playback system will be
presented together with the conclusions to be drawn for further
developments.