On November 21, 1877, Thomas Edison announced his invention of the phonograph, a machine that can record and play sound. Born on February 11, 1847, in Milan, Ohio, Thomas Alva Edison has been described as America’s greatest inventor. He is credited with developing many devices in fields such as electric power generation, mass communication, sound recording, and motion pictures. These inventions, which include the phonograph, … Continue reading Thomas Edison’s Invention of the Phonograph