A précis of the findings from two questionnaires 169 items for the 94 users of the aid, 88 for the 21 trainers) to evaluate the ultrasonic binaural sensory aid for the blind, a mobility and orientation device invented by the author. The results, summarized in three lengthy tables, indicate that 88 percent of the users found the device useful and that only 20 percent of the trainers thought that their own training was inadequate.
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References
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