This study concerns echolocation as a viable means for the enhancement of mobility for visually impaired and blind persons. The experimental group: five totally blind subjects, one with light perception only; the control group: eleven sighted, blindfolded subjects. Results showed a significant difference between the two groups’ ability to identify obstacles correctly using reflected sounds (echoes) with the experimental group being much more proficient.
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Ruthy Boehm (1986) studied this question.