The existing variety of theories and concepts about multimodal perceptions indicates that a sufficient understanding of interaction effects is still missing. However, to handle adequate acoustic comfort, sound quality, and perceived quality issues in the context of technical products, such as automobiles, aircrafts, or trains, the consideration of all senses is inevitable, since naive persons have great difficulties in separating between the senses inputs. Although few studies show no (or little) evidence for interaction effects; this means that the assessment of the combined stimuli (effect) is almost equal to the sum of individual stimuli assessments; it has to be assumed that interaction effects occur. In several studies it was requested that only the noise should be judged; however, the test persons, whether consciously or subconsciously, were influenced by the presence and magnitude of vibrations. It seems that humans tend to use different cues (such as sound) to assess the subjective comfort and quality assessments of vibrations [28]. All in all, explorative methods have shown that non-acoustic experts, presumably the majority of customers, unconsciously form an integrated impression of their surrounding merging different senses stimulations together. The results are emotional feelings, such as contentment, pleasure, displeasure, fear, and uneasiness, which have a major impact on the assigned product value. However, the subjects often cannot break down the reasons for their feelings, since several pieces of sensory information are gathered and processed subconsciously. Therefore, (a) sound and vibration must not be only considered as disturbing elements regarding the NVH-comfort, and (b) must be investigated further to intentionally use sound and vibration (and other inputs) to develop tailored solutions. To some extent the tactile sensation can be enhanced by using sound and presumably vice versa. For the study of these quantities and potential interaction effects, simulator systems must be developed and applied. Simulators allow for a focused investigation of multi-sensory effects under (more or less controllable) authentic conditions and allow for an interactive experience of the whole vehicle with its sound, vibration, haptics, and visual information. Several studies have shown that the effects of mutual interaction of different stimuli depending on their proportions affect the perception and evaluation of noise. Complex NVH situations that do not exhibit poor vibration properties usually result in an improved rating of the vehicle interior noise. Furthermore, tests have shown that good correlation exists between acoustic comfort evaluations made during test drives in a real vehicle and in a (stationary) driving simulator. Ratings in the real car that differ partially from the driving-simulator assessments may be attributable to the differing attention level. Finally, the goal of achieving the best product (sound) quality can only be attained if sound and vibration are understood as one entity, which must be well balanced. However, detailed knowledge about tuning these variables is still insufficient and further research is required.
Application of automotive driving simulators for sound and vibration research
Anwendung der Fahrzeug-Fahrsimulatoren zur Schall- und Schwingungsforschung
2010
10 Seiten, 5 Bilder, 3 Tabellen, 28 Quellen
Article (Journal)
English
Anwendung im Fahrzeugbau , Fahrsimulator , technische Akustik , Automobil , Flugzeug , Eisenbahn , sinnliche Wahrnehmung , Reizwahrnehmung , Qualitätsmerkmal , Testperson , mechanische Schwingung , Schwingungsverhalten , Messen akustischer Größen , Komfort (Eigenschaft) , Fahrerinformationssystem , Fahrerkabine , Wechselwirkung , Mensch-Maschine-Beziehung
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