Related Experiment Video
Updated: Jan 25, 2026

Estimating Vestibular Perceptual Thresholds Using a Six-Degree-Of-Freedom Motion Platform
Published on: August 4, 2022
Perceptual threshold of apparent source width in relation to the azimuth of a single reflection
1Applied Psychoacoustics Laboratory, The University of Huddersfield, Huddersfield, West Yorkshire, HD1 3DH, United KingdomD.S.Johnson2@hud.ac.uk, H.Lee@hud.ac.uk.
Abstract:
An investigation into the perceptual threshold of apparent source width (ASW) in relation to a single reflection azimuth was performed in binaural reproduction. In the presence of a direct sound, subjects compared the ASW produced by a single 90° reference reflection against ASW produced by a test reflection with a varying angle for four reflection delay times between 5 and 30 ms. Threshold angles were found to be approximately 40° and 130°, and did not appear to be dependent on delay time. It was also found that these threshold angles were associated to saturation in [1-IACCE3] versus reflection azimuth.
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