Discover how one invention led to another when Thomas Edison and his Menlo Park laboratory team refined Alexander Graham Bell’s telephone and, along the way, invented the phonograph, in this video adapted from Edison | AMERICAN EXPERIENCE. Calling on his experience as a telegrapher, Edison experimented on a device capable of recording the human voice: a phonograph. The invention was truly groundbreaking – until then, no one had ever played back recorded sound.

Note: The word "d*mn" is stated in the video at approximately 2:28.