Title: Vibro-acoustical comfort in cars at idle: human perception of simulated sounds and vibrations from 3- and 4-cylinder diesel engines

Authors: Etienne Parizet, Mael Amari, Valery Nosulenko

Addresses: Laboratoire Vibrations Acoustique, Insa Lyon, 25 bis av. Jean Capelle, F-69621 Villeurbanne Cedex, France. ' Laboratoire Vibrations Acoustique, Insa Lyon, 25 bis av. Jean Capelle, F-69621 Villeurbanne Cedex, France. ' Institute of Psychology, Russian Academy of Sciences, 13, Yaroslavskaya Str., 129366, Moscow, Russia

Abstract: A bench was used to reproduce the vertical vibrations of the seat, the vibrations of the steering wheel and the noise measured at the driver|s ears of cars running at hot idle. In a first experiment, subjects were only submitted to seat vertical vibrations; it appeared that comfort could be described by rms values of signals, without using ISO-2631 weightings. In a second experiment, subjects were submitted to all stimuli; the analysis of free verbalisations could explain the perceptual dimensions and were helpful for identifying the contribution of noise and vibration stimuli to overall comfort.

Keywords: sound and vibration perception; perceptual space; in-car comfort; vehicle noise; vehicle vibration; vibro-acoustic comfort; diesel engines; simulation; hot idle; engine idling; steering wheel vibrations; seat vibrations; ride comfort.

DOI: 10.1504/IJVNV.2007.014901

International Journal of Vehicle Noise and Vibration, 2007 Vol.3 No.2, pp.143 - 156

Published online: 16 Aug 2007 *

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