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Implementation of a Double StereoDipole System on a DSP Board ' Experimental Validation and Subjective Evaluation Inside a Car Cockpit

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Car cockpit is a critical environment for music; sound reproduction is in fact quite conditioned by reflections, echoes, engine noise and loudspeakers' set up. An important technique to improve sound comfort is a spatial equalization where both magnitude and phase of signal are controlled. This technique is performed by a stereodipole system where two closely loudspeakers are setting in front of listener and digital processing is performed real-time by a DSP board. Cross-talk cancellation is achieved using FIR filters, whose coefficients are obtained by inversion of the measured cockpit impulse response. In this paper an experimental validation of a double stereodipole system, one for driver and other for passenger, is performed by subjective evaluations inside a commercial car.

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