The gramophone used a flat disc to record sound. Who was its inventor?

Question

Quizplus · Accepted Answer

Emile Berliner invented the gramophone and made several key improvements to the phonograph, including the use of a flat disc instead of a cylinder to record sound. Thomas Edison invented the phonograph, which used a cylinder to record sound. Heinrich Hertz made important contributions to the development of electromagnetic theory, but was not directly involved in the invention of the gramophone. Alexander Graham Bell invented the telephone.

The Gramophone Used a Flat Disc to Record Sound