A modification of the scale illusion into a detection task for assessment of binaural streaming
Niclas A Janssen, Jeremy Marozeau, Lars Bramslow, Soren Riis
The Journal of the Acoustical Society of America | ACOUSTICAL SOC AMER AMER INST PHYSICS | Published : 2019
Binaural streaming by frequency-proximity was investigated without subjective listener-feedback by modifying the scale illusion of Deutsch [J. Acoust. Soc. Am. 57, 1156-1160 (1975)] into a detection-task. Nineteen listeners had to detect one deviation within a repeating melody stream, while simultaneously presented with a randomized distractor stream. Every second note in each stream was presented to the opposite ear, requiring binaural streaming to detect the deviant. Listeners performed well in this test but adding interaural delay or timbre-difference let the listeners group by lateralization instead. This confirms the grouping by frequency-proximity. The method could be used to investiga..View full abstract
The authors would like to thank everybody who participated in the experiment for their help and Tanmayee Uday Pathre for collecting part of the data. Thanks to the colleagues from the Hearing Systems Group for valuable comments and discussions, and Andrew Oxenham for a fruitful discussion in an early stage of the experiment. These studies were made possible by funding from the Centre for Excellence in Hearing and Speech Sciences (CHeSS), Oticon Medical, and the Oticon Foundation.