Edison Invents the Phonograph
In his Menlo Park, New Jersey laboratory, inventor Thomas Edison had been experimenting with telegraphy and telephony when he conceived a device to record and reproduce sound. Building on his work with embossing recorders, Edison sketched and constructed a prototype using a tinfoil-wrapped cylinder, a stylus, and a speaking tube. On August 12, 1877, he successfully recorded and played back his own voice reciting "Mary Had a Little Lamb," demonstrating the first practical sound recording technology. The invention astonished colleagues and marked a pivotal moment in audio technology development.
Why it matters: The phonograph laid the foundation for the recording industry, enabling the preservation and mass distribution of music, speech, and other audio, which transformed entertainment, education, and communication throughout the 20th century and beyond.