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When speaking to the mouth, the membrane vibrated according to the sound emitted and the vibration was transmitted to the stylus that engraved on the surface of a rotating wax cylinder, which constituted the recording system.
It was invented in 1878 by Thomas Alva Edison.
Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.