Delaying High Frequencies to Suppress Aliasing via Precedence Effect

As mentioned in §2, spatial aliasing limits the highest frequency and/or the widest source angle supported by a uniformly sampled line array. As also mentioned there, spatial aliasing may not be perceived because the spectrum as a whole may lock in perceptually at the correct angle. In other words, the ambiguity of the spatial angle of the highest-frequency components may be resolved perceptually by the brain's natural desire to ``make sense'' of an auditory scene. This effect can be enhanced by slightly delaying the high-frequency components relative to the low-frequency components that have no aliased interpretation. The idea is to force perception to hear the desired angle before the ambiguous spectral components are heard, so that they will all fuse at correct angle of arrival. This is of course altering the timbre of the sound, and may be considered off limits for that reason.