Department of Mechanical Engineering, The Hong Kong Polytechnic University
WALSH, S.J. and WANG, L., 2001. Investigation into the phase characteristics of wave fields. Proceedings of the Eighth International Congress on Sound and Vibration, 4, Hong Kong, China, July 2001, pp. 2305-2312.
The aim of the work reported in this paper is to establish a method of determining the diffusivity
of an SEA subsystem using the phase of transfer functions. Specifically, this paper reports an
investigation into the phase characteristics of transfer functions obtained using two flat plate
structures. In the first experiment the phase characteristics of bending waves in a directional field
are obtained using a perspex plate with additive damping. In the second experiment the phase
characteristics of bending waves in a diffuse field are obtained from a freely suspended steel
plate. The experimental data are normalised and compared to theoretical formula and limits for
the diffuse field and direct field proposed.