The ability of human listeners to segregate two sound sources was examined by conducting an experiment when the sources are concurrently presented from different directions in the median plane. A high-pass filtered pink noise was utilised as sound stimuli in a free-field condition and presented as either a pair of incoherent sound sources or a single-source. Subjects were tested with both monaural and binaural hearing, and responded whether they perceived sound from one or two directions. The responses showing "two directions" for pairwise stimuli exceeded 50% above 33.75° separation and reached above 70% at 67.5° in both hearing sessions. The difference in the ability to segregate sources in the median plane with binaural or monaural hearing was not prominently different.
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