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Enhanced Control of Sound Field Radiated by Co-axial Loudspeaker Systems using Digital Signal Processing Techniques
In multi-way loudspeakers, DSP techniques have been used so far mainly to correct frequency response, time alignment and out of axis lobbing. In this paper, a dedicated signal processing technique is described in order to also control the sound field radiation of a new 4 way co-axial source in the overlap frequency band of drivers. Trades-off and practical constraints (crossover, time shift, gain ...) are discussed and an optimization algorithm is proposed to provide the best achievable result. A real time implementation of this technique dedicated to the new 4-way co-axial source is presented and lead to a nearly ideal point source.
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