Ultrasonic binaural sensory aid for a blind person

Details Ultrasonic binaural sensory aid for a blind person Ultrasonic binaural sensory aid for a blind person

1987-09-02

1988-08-02

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367 99, 367910, G01S 968

Patent

active

047617705

ABSTRACT:
A method for processing a reflected echo signal which is received from an object and supplied to an ultrasonic binaural sensory aid comprising the step of stretching said reflected signal in time axis, and the step of converting the stretched signal into a signal of audible frequency, and a blind aid which works by the above mentioned method.

REFERENCES:
patent: 3366922 (1968-01-01), Kay
patent: 3618007 (1971-11-01), Anderson
patent: 4041441 (1977-08-01), Johnson
patent: 4349896 (1982-09-01), Hall, Jr.

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