The Invention of the Phonograph

The video explores Thomas Edison's groundbreaking work in sound recording, starting with his 1877 discovery of using a needle to etch sound onto a medium. It details the mechanics of the phonograph, which records sound by etching grooves into tinfoil wrapped around a brass cylinder. Edison's first recording was his voice reciting 'Mary Had a Little Lamb.' The video also covers Emile Berliner's development of the gramophone, which used a flat disk instead of a cylinder, marking the beginning of the recording industry.

Describe how sound waves are converted back into sound using the phonograph.

What was the main function of the gramophone developed by Emile Berliner?