Human Perception of Combined Sound and Vibration

Engineering Integrity Society

Tuesday, 19 April 2005

Millbrook Proving Ground

Human subjective response to sound and vibration is an important consideration in the design of many engineering systems. Over the past 100 years, scientific research and industrial practice have led to the development of several methods for estimating subjective intensity and, more recently, the judgement of quality.

Taken individually, the human subjective response to sound or vibration can be estimated using well-known methods. For sound, techniques such as dB(A), Stevens Loudness and Zwicker loudness are regularly used in several applications. For vibration, the frequency weightings defined by standards such as ISO 2631 and ISO 5349 are also widely applied. There are, however, no generally accepted methods for evaluating the two in combination. Does the sound change the perception of the vibration? What about the other way around? Do separate measures of intensity for the sound and the vibration provide a complete picture of the human response? This EIS workshop, the first on the topic of combined exposures, will address a selection of these issues.

The workshop will be of interest to designers, testing specialists, NVH experts and other individuals who routinely face the problem of evaluating sound or vibration. Particular emphasis will be placed on road vehicle and transport applications. The assembled team of experts will discuss recent theoretical and practical developments, and demonstrations involving a high dynamic bandwidth driving simulator will help to clarify the issues involved.

08.30-09.00
Coffee and registration

THEORETICAL BACKGROUND

09:00-09:40
Subjective equivalence of sound and vibration and vehicles
J. Giacomin and M. Ajovalasit (Sheffield University)

09:40-10:20
Human response to combined steering vibration and sound, and fundamentals of cross-modal and contextual interactions
N. Mansfield (Loughborough University)

10:20-10:50 Coffee/Tea

10:50-11:30
Developing best practice for use of an interactive NVH simulator
P. Jennings (Warwick University)

11:30-13:00
Demonstration in the Sound & Vibration Technology high bandwidth NVH simulator

13:00-14:00
Lunch

MEASUREMENTS AND SIMULATION

14:00-14:40
S&VT functional approach to NVH driving simulation
R. Williams (Sound & Vibration Technology)

14:40-15:20
Application of source path contribution methods to the NVH perception in vehicles
M. Batel and B. Ginn (Bruel & Kjaer)

15:20:15:50 Tea/Coffee

FULL VEHICLE TESTING

15:50-16:30
Methodologies for the analysis of NVH perceived quality
V. Falasca & F. Ferrian (Centro Ricerche Fiat)

16:30-17:10
Vibration and sound as measures of vehicle drivability
P. Schoeggl (AVL LIST Gmbh)

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