Audible traffic signal for visually impaired persons using multi

Communications: electrical – Pedestrian guidance

Patent

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Details

3406911, 340692, 34082519, 367116, G08G 1095

Patent

active

061279439

ABSTRACT:
An audible traffic signal adding apparatus for visually impaired persons includes two speakers and a control section. The two speakers are disposed at two ends of a crosswalk. The control section navigates a visually impaired person crossing the crosswalk by alternately outputting different sounds as in "back and forth call" operation from the two speakers disposed at the two ends of the crosswalk to the visually impaired person for a period during which crossing is permitted.

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patent: 5103223 (1992-04-01), Humphrey
patent: 5241307 (1993-08-01), Bidault et al.
patent: 5654705 (1997-08-01), Houten et al.

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