Auditory spatial representations of the world are compressed in blind humans

Kolarik, Andrew J. and Pardhan, Shahina and Cirstea, Silvia and Moore, Brian C.J. (2016) Auditory spatial representations of the world are compressed in blind humans. Experimental Brain Research. (Accepted)

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Abstract

Compared to sighted listeners, blind listeners often display enhanced auditory spatial abilities such as localization in azimuth. However, less is known about whether blind humans can accurately judge distance in extrapersonal space using auditory cues alone. Using virtualization techniques, we show that auditory spatial representations of the world beyond the peripersonal space of blind listeners are compressed compared to those for normally sighted controls. Blind participants overestimated the distance to nearby sources, and underestimated the distance to remote sound sources, in both reverberant and anechoic environments, and for speech, music and noise signals. Functions relating judged and actual virtual distance were well fitted by compressive power functions, indicating that the absence of visual information regarding the distance of sound sources may prevent accurate calibration of the distance information provided by auditory signals.

Item Type: Journal Article
Keywords: Blindness, Spatial hearing, Auditory distance, Multisensory plasticity, Sound localization
Faculty: Faculty of Science & Technology
Depositing User: Unnamed user with email andrew.kolarik@anglia.ac.uk
Date Deposited: 07 Nov 2016 08:40
Last Modified: 30 Jun 2017 13:02
URI: http://arro.anglia.ac.uk/id/eprint/701073

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