Haakon Bryhni, CTO at Elliptic Labs and Guenael Strutt, VP, Product Development, two researchers with a clearly technical background, talk about the team's research in the lab and how it led to a software technology that utilises ultrasounds for gesture recognition. Their patented ultrasound software technology can be as simple as opening a light with a gesture, up to permitting the replacement of the optical proximity hardware, on our mobile phones, with software. Something that actually brought strong funding and big business for the firm. Interviewed by Vicki Kolovou for Tech Talks Central.