ULTRASONIC BINAURAL SENSORY AID FOR A BLIND PERSON

摘要

The circuit utilizes the delaying method which delays the ultrasonic echo signals successively and generats the stereo audible warning signals for the detecting the obstacles. The circuit includes a transmitting unit (10), a receiving unit (20), a signal processing unit (30) converting the echo signals to the audible signals for detecting the direction of the obstacle, and a system control unit (40).