Title: Interior noise analysis based on acoustic excitation tests

Authors: S. Maruyama

Addresses: Research Engineer, Nissan Research Centre, Nissan Motor Co Ltd., 1 Natsushima-cho, Yokosuka 237, Japan

Abstract: This paper describes a method for analysing the low-frequency structure and airborne sound of a fully trimmed vehicle on the basis of acoustic excitation tests. In experimental analyses of structure-borne sound, there are times when the coupled modes of the vehicle cannot be identified by direct measurement. It is shown that, in such cases, it is necessary to use the vibration distribution obtained reciprocally by acoustic excitation from a loudspeaker located at the passenger|s ear position. It is also shown that the use of direct and reciprocal measurements in analyses of airborne sound yields valuable information for reducing the interior noise level.

Keywords: acoustic excitation tests; acoustic transfer function; vehicle interior noise; mechanical-acoustical transfer function; reciprocity principle; vehicle noise; vehicle design.

DOI: 10.1504/IJVD.1997.062041

International Journal of Vehicle Design, 1997 Vol.18 No.1, pp.1 - 18

Published online: 29 May 2014 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article