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Sound Field Reproduction Applied to Flight Vehicles Sound Environments

This paper proposes a preliminary theoretical study for sound field and sound environment reproduction in flight vehicles. A fully-coupled cavity, cylindrical shell and exterior radiation model approximates an aircraft cabin mock-up. Material and geometry charateristics are inspired by measurements perfomed on a cabin mock-up. The sound field reproduction is based on reproduction error minimization at a microphone array positionned in the cavity. Two reproduction systems, based on actuators or loudspeakers are simulated in order to compare their feasability and performance. The model linking excitator strength with the sound pressure on the spatially extended array region is developped in a matricial form. The promising results obtained in terms of reproduced pressure in the array region in both cases presume the reliability of such dedicated systems.

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