Sound Field Reproduction of Real Flight Recordings in Cabin Mock-Up
Sound environment reproduction of various flight conditions in aircraft mock-ups is a valuable tool for the study, prediction, demonstration and jury testing of interior aircraft sound quality. To provide a faithful reproduced sound environment, time, frequency and spatial characteristics should be preserved. Physical sound field reproduction approaches for spatial sound reproduction are mandatory to immerse the listener body in the proper sound field so that localization cues are recreated. For sound field reproduction inside cabin mock-up, our approach relies on multichannel equalization using least-mean-square formulation. In this paper, a modified multichannel equalization procedure is proposed to simplify the selection of reproduction sources regularization. The paper presents objective evaluations of reproduced sound fields on the basis of real flight recordings using an 80-channel microphone array and 41 actuators in the cabin mock-up.
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