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Structural and Acoustic Analysis of Multi-Actuator Panels

Multi-Actuator Panels (MAPs) are a possible solution to satisfy the requirement of a large number of loudspeaker channels inherent in wave field synthesis. The structural acoustic behaviour of MAPs has been measured with a Laser Doppler Vibrometer and acoustic radiation simulation has been performed using a discretized Rayleigh I integral. The analysis shows that, due to the large structural damping, the acoustic radiation is almost entirely produced by the near-field around the excitation point on the panel. It is concluded that the model of an infinite panel is more appropriate than that of the widely known Distributed Mode Loudspeaker.

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