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Visually impaired or blind people have a reduced ability to perceive their environment. The accessible environment is drastically constrained by the length of canes. Numerous approaches e.g. ultrasound enhanced canes did not solve the problem. Most of them use the auditory system for information transfer, which is not appreciated by the blind because acoustics are already involved in the spatial orientation...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.