Laugh enhancer using laugh track synchronized with the user's laugh motion

In television shows, we are familiar with the sound of artificial laughter, the so called "canned laughter" or "laugh track". It generally has an enhancing effect on the viewer's desire to laugh. However, if the sound is played when the user dislikes the content, it works negatively. To cope with this problem, we propose a system that produces the laugh track synchronized with the user's desire to laugh. We use a use a myoelectric signal from the diaphragmatic muscle to detect an initial laugh, and dolls around the user to produce the laugh sound. We speculated that although the initial laugh trigger from the user is necessary, the system can still effectively enhance the laugh activity, and even affect the subjective quality of the contents.