Acoustic based modal filtering of orthogonal radiating functions for global error sensing: Part II. Implementation

摘要

This paper, the second of two companion pieces, is concerned with the implementation of an acoustic-centric sensing system, based on different orthogonal decompositions. An important consideration is that the sensing strategy is capable of being applied to a large and complex noise source. A sensing array consisting of 128 microphones and a custom-built electronic filtering system used in the data fusion process is demonstrated. The authors examine different estimates of the global error criterion, radiated sound power, based on orthogonal multipole and radiation modes. The experiments are an extension of the simulations in the first part of this work, where each orthogonal constituent is filtered, in real time, from the 128 microphone signals.