Phys.org (June 9) On June 9, 1922, an Illinois professor showed how movies could talk. Electrical and Computer Engineering professor Joseph Tykociner had given several private demonstrations of his inventions, but on June 9, 1922, he gave his first public lecture and demonstration of his sound on film apparatus. A film of his demonstration was one of the first to successfully incorporate sound. Also: Electrical Business (June 21)