AS CHILDREN all over the place are delighted to be taught in science class, sound can shatter glass. May it even be doable, then, to make use of acoustic waves to disrupt the electromechanical sensors that drones require to fly? To seek out out, 4 engineering college students on the College of Toronto repurposed small automotive audio system to cobble collectively a contraption “for blasting a drone with sound”, as one in all them, Michael Acquaviva, places it. It labored in early exams, although solely at shut vary. Drones 50cm away wobbled. At 25cm, they crashed.