Creating non-contact upward force in 3D space which was used in TEDxTokyo 2104 by Yoichi Ochiai.
Produces focused pressure (φ1cm) in the air. User can feel with the flat of one's hand or move something soft.
Please note that don't put ears closer to the device nor apply to eyes since it produces high power ultrasonic wave.
3 sets
By 7/26