What material was used for the cylinders of the graphophone developed by Alexander Graham Bell and his associates?
Answer
Wax-coated cardboard
Around 1885, the graphophone was developed as an improvement over earlier mechanical recording devices. The inventors utilized cylinders made of wax-coated cardboard, which proved to be more durable than the tin foil used in previous iterations. The wax surface held the grooves much better, offering superior sound quality and allowing for significantly more playback cycles before the recording medium would degrade.
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