This paper presents a sub-band modification of the Wave-Field Synthesis 3-D audio algorithm for improving the degradations in the reproduction above the spatial aliasing frequency. With the method presented, the spectrum above the spatial aliasing frequency for each source is reproduced using only one loudspeaker of the array. Several advantages are obtained: there is not any comb-filtering effect, avoids dependence between the spatial aliasing frequency and the cross-over frequency on the transducers and some computational cost savings. The characteristics of localization cues of the human auditory system at high frequencies help to validate psico-acoustically this method.
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