Historical information
An ultrasonic torch sends out a high frequency beam that bounces off items in it's path and sends back signals to an ear piece worn by the user. A change in sound indicates the nearness of an object, and it was (at the time) thought to be a possible replacement for white canes in the future. In this image, a man descends steps at the William Street building of RBS, using the torch to guide him.
Physical description
B/W photograph of man using torch
Inscriptions & markings
6/68049
Ultrasonic torch being used at the Royal Blind Society.
