The role of low frequency components in median plane localization

概要

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The high frequency components of an auditory stimulus are considered to he the primary contribution to median plane localization. However, a number of studies have demonstrated that the low frequency components of a stimulus are also important in median plane localization. Asano et al. concluded that important cues for front-back discrimination seem to exist in the frequency range below 2kHz. In the present paper, localization tests were performed in order to examine the contribution of low frequency components to median plane localization. In these tests, the higher (above 4,800 Hz) and lower (below 4,800Hz) frequency components, respectively, of a wide-band white noise were simultaneously presented from different directions so that the individual components provided different directional information. The results of these tests reveal that : (1) when the source is a wide band signal, the higher frequency components are dominant in median plane localization, whereas the lower frequency components do not contribute significantly to the localization, and (2) important cues for front-back discrimination do not exist in the low frequency range.
社団法人日本音響学会の論文