NEAR-FIELD ACOUSTIC INTENSITY MAPPING USING A CLOSED SURFACE

A procedure for constructing near-field acoustic intensity maps is pre sented in this paper. The normally coincident measurement locations fo r the X, Y, and Z components about each grid point are repositioned in order to construct an imaginary box centered on the grid point. The p osition Sind orientation of these measurements define the surfaces of the box, and are used to estimate the intensity vector at box center. This process is repeated at each grid point in the plane of interest. The technique allows a statistical assessment to be made of the intens ity map's reliability without making assumptions about the nature of t he acoustic field. (C) 1995 Acoustical Society of America.