Recent studies on the effect of signal frequency on auditory vertical localization
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The authors have been involved in a series of studies showing that the fundamental frequency of a complex tone, the center frequency of a noise band, or the cut-off frequencies of simultaneously presented high- and low-passed noise bands, systematically affect the elevation of auditory images – such that high frequencies are associated with high elevations, and low frequencies with low elevations. These studies show this effect not just for median plane localization, but in some circumstances even for sources on the aural axis. This paper reviews the findings of these studies, and considers their implications and applications, including for auditory display.