Museum of Science and Industry

Front:
THE VOCODER See And Hear It So Change Your Voice! Chebaa YOWVoice! teco

Back:
CB MUSEUM OF SCIENCE AND INDUSTRY Chicago, Illinois THE "VOCODER" - A most important feature of Bell Telephone's "Hall of Communications“ is this device, called a "Vocoder," which can be used to teach speech to deaf persons. It does tricks, too. Visitors are invited to participate in frequent demonstrations which turn their voices inside-out and upside-down. P86768 • Museum of Science and Industry, East 57 and South Lake Shore Drive Mastichrome © COLOURPICTURE BOSTON, MASS. 02130