Decorrelation of surround channels solved in-head localization in home theaters.

Evidence

The first remedy was to reverse the polarity of one of the surround loudspeakers, which helped. A substantial improvement, introduced by Shure HTS, was to electronically decorrelate the sounds emerging from the left and right loudspeakers (Julstrom, 1987). This was very effective, and the idea, although not the Shure patented algorithm, was adopted by THX. — Toole, Floyd E, Sound reproduction- the acoustics and…, 761

Categorization

• XREF: Connects to the reader’s psychoacoustics work on binaural cues and interaural decorrelation as a perceptual cue for spaciousness.