3C20.21 - Grooves on a Record - Model
These wooden models are used to demonstrate the ridges in the grooves of a record that the needle travels over. The vibrations of the needle as it moves over the grooves at constant speed are amplified giving us the music or speech that is heard.
- Carl Haber, "Seeing Voices: Imaging the Earliest Sound Recordings", Physics Today, March 2014, p. 68.
- Alaina G. Levine, "A Sweet Sound: Physicists Reconstruct Primitive Recordings", March APS News, March 2015, Vol. 24, # 3, p. 3.
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