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Optimising the value of sound quality evaluations by observing assessors' driving strategies

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Giudice, Sebastiano D., Jennings, P. A., Cain, Rebecca, Dunne, Garry, Allman-Ward, Mark and Williams, Roger. (2008) Optimising the value of sound quality evaluations by observing assessors' driving strategies. The Journal of the Acoustical Society of America, Vol.123 (Iss.5). pp. 3245-32451. ISSN 0001-4966

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Abstract

Traditionally vehicle sound evaluations have been conducted either whilst driving a car or by auditioning fixed test conditions in a listening room. On‐road testing provides the right context but the results are often inconsistent and unrepeatable. Furthermore it is not possible to evaluate prototype sounds or carry out back‐to‐back comparisons. In‐room evaluations improve the statistical confidence, but the context of the assessments is unrepresentative. Interactive NVH vehicle simulators enable assessments to be performed in a setting representative of real appraisals. Accurate sounds can now be generated in real‐time, and assessors can adopt a driving strategy that allows their own interpretation of the attributes. The benefits include the opportunity to understand how preferences are formed by assessors, albeit with added complexities. Different assessors may be associating their preferences on different operating conditions which have different acoustical properties. Therefore for engineers to identify the key features that influence perception they need to be able to relate the driving strategies with the subjective preferences. This paper reports on new observational methods which capture assessors' decision making strategies. It demonstrates how these help in relating subjective preferences to vehicle operating conditions and how to design a structured evaluation to reduce sources of experimental error.

Item Type: Journal Article
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title: The Journal of the Acoustical Society of America
Publisher: Acoustical Society of America
ISSN: 0001-4966
Date: May 2008
Volume: Vol.123
Number: Iss.5
Number of Pages: 1
Page Range: pp. 3245-32451
Identification Number: 10.1121/1.2933505
Status: Peer Reviewed
Access rights to Published version: Restricted or Subscription Access
Version or Related Resource: This item was originally presented at Acoustics '08, Paris, France, Jun 29 - Jul 4, 2008.
Related URLs:
URI: http://wrap.warwick.ac.uk/id/eprint/46894

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