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Related Experiment Video

Updated: Nov 2, 2025

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
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Backward spatial perception can be augmented through a novel visual-to-auditory sensory substitution algorithm.

Ophir Netzer1, Benedetta Heimler2,3,4, Amir Shur1

  • 1The Cognitive Science Program, The Hebrew University of Jerusalem, Jerusalem, Israel.

Scientific Reports
|June 8, 2021
PubMed
Summary
This summary is machine-generated.

Humans can extend their senses by using auditory cues to perceive objects behind them. This study demonstrates successful sensory augmentation, enabling individuals to "see" in their blind spots using sound.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Sensory Perception

Background:

  • Humans possess natural visual spatial perception but have a blind spot in the backward spatial field.
  • Investigating methods to augment natural perceptions during adulthood is a key area of research.

Purpose of the Study:

  • To determine if visual spatial perception can be augmented to include the backward spatial field using auditory sensory substitution.
  • To assess the efficacy of the "Topo-Speech" algorithm in conveying object location information.

Main Methods:

  • Developed a sensory-substitution algorithm called "Topo-Speech" that uses vocal-sound manipulations to convey object location.
  • Tested blindfolded sighted participants in two groups, assessing their ability to locate objects in forward and backward spatial fields after brief training.

Main Results:

  • Participants successfully used Topo-Speech to locate objects in both forward and backward spatial fields on a 3x3 grid.
  • Performance in locating objects behind the back was comparable to locating them in front, indicating effective sensory augmentation.

Conclusions:

  • Novel spatial sensory information can be successfully encoded through existing sensory systems to extend human perception.
  • These findings have significant implications for spatial perception, sensory augmentation, and sensory rehabilitation strategies.