Abstract
Binaural fusion and the ability to resolve or separate coexisting binaural images greatly facilitates speech communication in the presence of competing auditory cues. However, the study of these two processes has been somewhat neglected by clinical audiologists. In this paper quantitative methods for assessing lateralisation (fusion) ability are discussed; together with a review of schemes for presenting experimental subjects with competing binaural images. Current understanding of the physiological basis of image formation, based essentially upon knowledge of peripheral auditory mechanisms, allows the theoretical prediction of perceived image location to be attempted. These predictions have been tested using a computer-controlled lateralisation experiment; and departures from predicted and judged locations found. The significance of these departures is briefly discussed.
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