Perceptual Detection Thresholds for Alterations of the Azimuth of Early Room Reflections (en)

* Presenting author
Day / Time: 09.03.2023, 15:40-16:00
Room: Saal X 5-6
Typ: Vortrag (strukturierte Sitzung)
Abstract: It is generally unclear how precisely the incidence directions of early room reflections need to be rendered in room acoustic auralizations to avoid a detectable perceptual change. A small number of cases have been studied in the literature whereby the focus was mostly on altering the incidence direction of one of the early reflections. We present an adaptive ABX threshold test with 20 subjects in which we determined the just noticeable difference for simultaneous alterations of the azimuth of the incidence angles of 5 pronounced early reflections. The stimuli were presented binaurally with headtracking, and speech and drums were used as signals. The results show that alterations of as low as 4 degrees can be audible whereby a large variance between the subjects was apparent. No difference was found between the speech signal and the drums, and all outliers that we recorded were produced by inexperienced listeners.


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