Electronic Travel Aids
are classified as follows: obstacle detectors based on ultrasonic and laser beams emission into the environment in order to calculate the distance between the subject and the detected object, navigation systems with the purpose of acknowledging information about the setting and position of the subject in local or global coordinate system of the scenery and environmental sensors.
I teach teachers to teach blind people how to travel using canes, dogs and electronic travel aids
The list of such electronic travel aids
is long, and will not be treated in detail here.
The chapter on orientation devices introduces developments in GPS systems and other digital aids, but the chapter on electronic travel aids
develops this topic further, providing sample lesson sequencing for instruction with advanced devices.
Abstract: This study evaluated a protocol that was developed to assess how beneficial electronic travel aids
are for persons who are visually impaired.