Auditory spatial representations of the world are compressed in blind humans

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.

[1]  Franco Lepore,et al.  Early- and Late-Onset Blind Individuals Show Supra-Normal Auditory Abilities in Far-Space , 2004, Current Biology.

[2]  P. Coleman.  An analysis of cues to auditory depth perception in free space. , 1963, Psychological bulletin.

[3]  W. G. Gardner,et al.  HRTF measurements of a KEMAR , 1995 .

[4]  J. Philbeck,et al.  Comparison of two indicators of perceived egocentric distance under full-cue and reduced-cue conditions. , 1997, Journal of experimental psychology. Human perception and performance.

[5]  Mark B. Gardner,et al.  Distance Estimation of 0° or Apparent 0°‐Oriented Speech Signals in Anechoic Space , 1969 .

[6]  D. Mershon,et al.  Intensity and reverberation as factors in the auditory perception of egocentric distance , 1975 .

[7]  Daniel Rowan,et al.  Identification of the lateral position of a virtual object based on echoes by humans , 2013, Hearing Research.

[8]  Christophe Jouffrais,et al.  Reaching to Sound Accuracy in the Peri-personal Space of Blind and Sighted Humans , 2012, ICCHP.

[9]  Brian C. J. Moore,et al.  An assessment of virtual auditory distance judgments among blind and sighted listeners , 2013 .

[10]  Franco Lepore,et al.  Adaptation to sensory loss. , 2011, Wiley interdisciplinary reviews. Cognitive science.

[11]  G. Sandini,et al.  Poor Haptic Orientation Discrimination in Nonsighted Children May Reflect Disruption of Cross-Sensory Calibration , 2010, Current Biology.

[12]  Brian C. J. Moore,et al.  An assessment of auditory-guided locomotion in an obstacle circumvention task , 2016, Experimental Brain Research.

[13]  Pavel Zahorik,et al.  Direct-to-reverberant energy ratio sensitivity. , 2002, The Journal of the Acoustical Society of America.

[14]  D H Ashmead,et al.  Obstacle perception by congenitally blind children. , 1989, Perception & psychophysics.

[15]  Adelstein Am,et al.  Revision of the international classification of diseases. , 1971, Lancet.

[16]  Michael A Akeroyd,et al.  The detection of differences in the cues to distance by elderly hearing-impaired listeners. , 2007, The Journal of the Acoustical Society of America.

[17]  Andrew J. Kolarik,et al.  Discrimination of virtual auditory distance using level and direct-to-reverberant ratio cues. , 2013, The Journal of the Acoustical Society of America.

[18]  M. P. Zwiers,et al.  A Spatial Hearing Deficit in Early-Blind Humans , 2001, The Journal of Neuroscience.

[19]  Jörg Lewald,et al.  Opposing effects of head position on sound localization in blind and sighted human subjects , 2002, The European journal of neuroscience.

[20]  G. Sandini,et al.  Impairment of auditory spatial localization in congenitally blind human subjects , 2013, Brain : a journal of neurology.

[21]  Tyler Thrash,et al.  Spatial navigation by congenitally blind individuals , 2015, Wiley interdisciplinary reviews. Cognitive science.

[22]  Andrew J. Kolarik,et al.  Evidence for enhanced discrimination of virtual auditory distance among blind listeners using level and direct-to-reverberant cues , 2012, Experimental Brain Research.

[23]  Brian C J Moore,et al.  Using Acoustic Information to Perceive Room Size: Effects of Blindness, Room Reverberation Time, and Stimulus , 2013, Perception.

[24]  B. Jones,et al.  Spatial perception in the blind. , 1975, British journal of psychology.

[25]  R. Klatzky,et al.  Assessing auditory distance perception using perceptually directed action , 1998, Perception & psychophysics.

[26]  J Bamford,et al.  The BKB (Bamford-Kowal-Bench) sentence lists for partially-hearing children. , 1979, British journal of audiology.

[27]  F. Lepore,et al.  Plasticity of the Dorsal “Spatial” Stream in Visually Deprived Individuals , 2012, Neural plasticity.

[28]  Robert J Zatorre,et al.  Trade-Off in the Sound Localization Abilities of Early Blind Individuals between the Horizontal and Vertical Planes , 2015, The Journal of Neuroscience.

[29]  M. Lassonde,et al.  Blind subjects process auditory spectral cues more efficiently than sighted individuals , 2004, Experimental Brain Research.

[30]  D. Ja,et al.  Scales for perceived egocentric distance in a large open field: comparison of three psychophysical methods. , 1985 .

[31]  Michael S Kobor,et al.  Development and the epigenome: the 'synapse' of gene-environment interplay. , 2015, Developmental science.

[32]  Pavel Zahorik,et al.  Assessing auditory distance perception using virtual acoustics. , 2002, The Journal of the Acoustical Society of America.

[33]  E. Lehmann,et al.  Prediction of energy decay in room impulse responses simulated with an image-source model. , 2008, The Journal of the Acoustical Society of America.

[34]  Jennifer L. Milne,et al.  Enhanced auditory spatial localization in blind echolocators , 2015, Neuropsychologia.

[35]  David C. Reutens,et al.  Early but not late-blindness leads to enhanced auditory perception , 2010, Neuropsychologia.

[36]  R. Zatorre,et al.  Relevance of Spectral Cues for Auditory Spatial Processing in the Occipital Cortex of the Blind , 2011, Front. Psychology.

[37]  D. Burr,et al.  Early visual deprivation severely compromises the auditory sense of space in congenitally blind children. , 2016, Developmental psychology.

[38]  Melvyn A. Goodale,et al.  The role of head movements in the discrimination of 2-D shape by blind echolocation experts , 2014, Attention, perception & psychophysics.

[39]  C Veraart,et al.  Processing of auditory information by the blind in spatial localization tasks , 1985, Perception & psychophysics.

[40]  David Whitney,et al.  Ultrafine spatial acuity of blind expert human echolocators , 2012, Experimental Brain Research.

[41]  Nikos K. Logothetis,et al.  Auditory looming perception in rhesus monkeys , 2002, Proceedings of the National Academy of Sciences of the United States of America.

[42]  A. Noë,et al.  A sensorimotor account of vision and visual consciousness. , 2001, The Behavioral and brain sciences.

[43]  Brian C J Moore,et al.  Determination of Preferred Parameters for Multichannel Compression Using Individually Fitted Simulated Hearing Aids and Paired Comparisons , 2011, Ear and hearing.

[44]  Tina Iachini,et al.  Does blindness affect egocentric and allocentric frames of reference in small and large scale spaces? , 2014, Behavioural Brain Research.

[45]  D. Brungart,et al.  The effects of production and presentation level on the auditory distance perception of speech. , 2001, The Journal of the Acoustical Society of America.

[46]  Makoto Otani,et al.  Numerical study on source-distance dependency of head-related transfer functions. , 2009, The Journal of the Acoustical Society of America.

[47]  A. Bronkhorst,et al.  Auditory distance perception in humans : A summary of past and present research , 2005 .

[48]  Seymour Axelrod,et al.  Effects of early blindness : performance of blind and sighted children on tactile and auditory tasks , 1959 .

[49]  D H Ashmead,et al.  Spatial Hearing in Children with Visual Disabilities , 1998, Perception.

[50]  Jörg Lewald,et al.  Vertical sound localization in blind humans , 2002, Neuropsychologia.

[51]  Pavel Zahorik,et al.  Auditory distance perception in humans: a review of cues, development, neuronal bases, and effects of sensory loss , 2015, Attention, perception & psychophysics.

[52]  Jörg Lewald,et al.  Exceptional ability of blind humans to hear sound motion: Implications for the emergence of auditory space , 2013, Neuropsychologia.

[53]  P Zahorik,et al.  Estimating Sound Source Distance with and without Vision , 2001, Optometry and vision science : official publication of the American Academy of Optometry.

[54]  M. Lassonde,et al.  Cross-modal plasticity for the spatial processing of sounds in visually deprived subjects , 2008, Experimental Brain Research.

[55]  R. Zatorre,et al.  Organization and Reorganization of Sensory-Deprived Cortex , 2012, Current Biology.

[56]  Esteban R Calcagno,et al.  The Role of Vision in Auditory Distance Perception , 2012, Perception.

[57]  Markus Lappe,et al.  Absolute travel distance from optic flow , 2005, Vision Research.

[58]  Monica Gori,et al.  Auditory and proprioceptive spatial impairments in blind children and adults. , 2017, Developmental science.

[59]  Cesare Cornoldi,et al.  Developing Spatial Knowledge in the Absence of Vision: Allocentric and Egocentric Representations Generated by Blind People When Supported by Auditory Cues , 2010 .

[60]  M. Paré,et al.  Early-blind human subjects localize sound sources better than sighted subjects , 1998, Nature.

[61]  Kathleen A. Turano,et al.  Optic-flow and egocentric-direction strategies in walking: Central vs peripheral visual field , 2005, Vision Research.