What was the medium used by Scott de Martinville to capture the physical trace of sound waves?

Answer

Soot-covered paper or parchment

The phonautograph utilized a stylus connected to a diaphragm to etch or trace vibrations onto a sheet of soot-covered paper or parchment that moved horizontally.

What was the medium used by Scott de Martinville to capture the physical trace of sound waves?

#Videos

The First Man To Record Sound - YouTube

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