Abstract:Abstract:Andy is a 20years old college student who was born blind without visual memory and light sensitization. He lives in the school dormitory from Mondays through Fridays and spends most of his time on campus. Andy tells us that he has had experience since childhood in using echoes to search for objects and spatial scales in the environment (e.g. buildings, plants, doorways, etc.). He believes "using echoes to identify one's location is an effective method". Thus, we investigated objects that can provide A… Show more
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