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Investigation of Perceptual Interaural Time Difference Evaluation Protocols in a Binaural Context

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We report the advantages and drawbacks of three protocols (adjustment, AFC-yes/no, and AFC-left/right discrimination protocols) evaluating the estimation of the interaural time differences (ITDs) for correct lateralization perception. The protocols were compared with respect to reliability of the perceived ITD and just noticeable difference (JND) estimations, robustness to participants' errors, effect of the number of tested blocks of trials, and test duration. Binaural stimuli were employed, including all spatial cues for sound sources placed at horizontal positions of 30° and 90°. All three protocols yielded comparable perceived ITD but different JNDs at 30°. At 90°, both the AFC-left/right and the adjustment protocols were more problematic than the yes/no protocol. Overall, only the yes/no protocol fulfilled the requirements of this study, i.e. a quick protocol that can be used for all angles.
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Document Type: Research Article

Publication date: January 1, 2016

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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