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Science 21 May 1965:
Vol. 148. no. 3673, pp. 1107 - 1108
DOI: 10.1126/science.148.3673.1107
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Articles

Sonar System of the Blind: Size Discrimination

Charles E. Rice 1 and Stephen H. Feinstein 1

1 Stanford Research Institute, Menlo Park, California 94025

Measurements were made of the ability of four blind subjects to use echoes to discriminate between objects of different sizes placed in front of them. Threshold estimates indicate that objects with area ratios as low as 1.07/1 could be discriminated.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)