Abstract: A polysensory mobility aid comprising first and second signal generating means which produce audio frequency signals, respectively, these signals being coupled to two electrically operable stimulating devices which provide both tactile and auditory stimulation. Each of the signal generating means includes two camera means that generate signals representative of the brightness of optical images projected thereonto. Each signal generating means includes a first fixed frequency signal generator which provides a first signal, and a second variable frequency signal generator which provides a second signal which varies in frequency between limits of a predetermined frequency spectrum, each first and second signal generator being coupled to one of the stimulating devices. Each camera means includes first and second photosensitive devices disposed to receive radiation from a common object.