4 apr 1877 anni - Invention of the Phonograph

Descrizione:

Phonograph was first invented by Thomas Alfa Edison. This tool was used for communication before the telephone was invented. People were amazed by how they can hear a dead man's voice who was thought to be gone forever only by this simple tool.

My own experience: I have never heard of this device every in my entire life and only now learning about it.

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