Modal beam processing of acoustic vector sensor data

Abstract

The present invention, as typically embodied, represents a novel methodology for effecting linear processing of output signals that are received from one or more acoustic vector sensors. First, as pertains to each modal beam, the modal beam amplitude response b, is calculated as the matrix product of a data vector d and a modal weighting vector w, wherein the weighting vector wis uniquely defined in terms of three different linear modal weighting vector equations corresponding to w, w, and w, respectively. Second, as pertains to all of the modal beams, the directional beam amplitude response bis calculated as the sum of all of the individual modal beam amplitude responses b. Because the inventive processing methodology is linear in nature (as distinguished from non-linear, e.g., quadratic, in nature), inventive practice is highly effective for performing quantitative acoustic measurements of sound fields.