| 摘要 |
The present invention relates to an automatic volume control system using a real-time location tracking ultrasonic device, more particularly, to an automatic volume control system using a real-time location tracking ultrasonic device which has a real-time location tracking ultrasonic device which tracks a movement of listener using a phased arrayed ultrasonic sensor in real time, and controls a transmission direction of ultrasound-modulated voice signal by changing direction and angle of an ultrasonic speaker toward the listener. The ultrasonic speaker consists of a single or a plurality of piezoelectric devices, and the phased array ultrasonic sensor in the center, and the angle and direction can be changed by a motor driving unit. The volume of the ultrasonic speaker can be adjusted by a distance, measured by the phased array ultrasonic sensor, between the listener and speaker. According to the present invention, the audible area of voice signal outputted from the speaker can be automatically adjusted according to the location of the listener by tracking the location of the listener in real time, and the optimized audible state for the listener can be maintained by measuring the distance between the listener and speaker, and automatically providing the optimized volume. |
