VARI-SOUND: A Varifocal Lens for Sound

VARI-SOUND: A Varifocal Lens for Sound Gianluca Memoli, Letizia Chisari, Jonathan P. Eccles, Mihai Caleap, Bruce W. Drinkwater, Sriram Subramanian CHI ’19: ACM CHI Conference on Human Factors in Computing Systems Session: Sound-based Interaction Abstract Centuries of development in optics have given us passive devices (i.e. lenses, mirrors and filters) to enrich audience immersivity with light effects, but there is nothing similar for sound. Beam-forming in concert halls and outdoor gigs still requires a