Beamforming-based partial field decomposition in nearfield acoustical holography

Abstract

In this paper, a methodology for partial field decomposition is presented that is based on the beamforming algorithm for the application of acoustical holography to the composite sound field generated by multiple incoherent sound sources. The unique aspect of the method is the use of the estimated sources identified via beamforming as the reference sources in the decomposition procedure. Numerical simulations are performed with particular emphasis on the robustness of the proposed technique under various situations. The experimental results show that the method identifies the sources very effectively regardless of the distance from source to reference and also has potential to be used for application to distributed sources.