Which of the following devices relied on a cylinder wrapped in tin foil for recording?
Answer
Phonograph
Thomas Edison's phonograph, invented in 1877, utilized a cylinder covered in tin foil as the recording medium. Sound waves entering the horn caused a diaphragm and stylus to vibrate, which physically indented the soft foil on the rotating cylinder. While this successfully achieved both recording and playback, the foil was fragile and degraded quickly, limiting the usefulness of the recordings after only a few plays.
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