Enhancement of in-vehicle soundfields using spectral stereo processing

Outlines an approach to vehicle soundfield enhancement based on the spectral stereo theory of Cooper and Bauck (1980) which allows the possibility of (i) providing a symmetrically displaced virtual stereo stage centred on the off-centre listener, and (ii) providing spaciousness enhancing delayed signals from virtual lateral loudspeakers. The most significant advantage of the system is the creation of a more credible stereo stage with the added possibility of enhancing the illusion of spaciousness of normal stereo reproductions without involving the expense or loudspeaker placement problems of extra channels