Abstract: This study presents an auditory guidance system for the blind. We design a simple but useful wearable system composed of two types of sensor subsystems. One is stereoscopic sonar system which functions as an environment sensing and the other is the floor obstacle detection. Wide beam ultrasound sensors are used to detect obstacles in environment sensing function, so a broader range is covered. The second subsystem uses a narrow beam ultrasound sensor to detect obstacles at floor level. This type of sensor is required for sensing a limited surface in the path of the user for detecting holes and small obstacles. These two functions increases the mobility of blind people by offering extends of its own body functions. Experimental results are provided to show the effectiveness of the proposed apparatus.