| 摘要 |
Attention can be effectively called to an advertisement, and the effect of calling attention can be known. A control device 10 is connected to a super-directional speaker 40 that outputs audio in a specific direction, and a speaker pedestal 41 that adjusts the audio output direction of the super-directional speaker 40. The control device 10 takes a picture of an area in front of an advertisement display surface by means of a camera 50, detects a person photographed in the image captured by the imaging unit as a target, adjusts the audio output direction of the super-directional speaker 40 to the direction of the target by means of the speaker pedestal 41, and causes the super-directional speaker 40 to output audio. After outputting the audio, the control device 10 takes another picture by the camera 50, and again determines the direction in which the face of the target is looking based on this picture.
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