| 摘要 |
<P>PROBLEM TO BE SOLVED: To output a directional sound to output targets in simple configuration even if there are a plurality of output targets. <P>SOLUTION: An acoustic system 1 comprises an ultrasonic speaker 3 including a plurality of ultrasonic transducers 31 arranged side by side in a matrix shape, a camera 4 for recognizing one or more target persons, and a speaker control unit 54 which controls a direction of a directional sound S based on a result of recognition by the camera 4. In accordance with an angle of the one or more target persons recognized by the camera 4, the speaker control unit 54 adds a delay time to a sound signal K to be inputted to each of the plurality of ultrasonic transducers 31. Thus, in the acoustic system 1, the directional sounds S based on sound source data D1 and D2 can be outputted to each target person in a pin-point manner so as to trace the one or more target persons without physically driving the ultrasonic speaker 3 itself and without providing a plurality of ultrasonic speakers 3. <P>COPYRIGHT: (C)2012,JPO&INPIT |
