Phonautograph (c. 1857) apparatus for studying sound vibrations graphically, invented by (Edouard) Leon Scott de Martinville. Tuning fork vibrated by bow or iron rod, and vibration traced on cylinder coated with lampblack. Engraving, 1872

---

Size: 3543px × 2660px
Location:
Photo credit: © Photo12/Ann Ronan Picture Library / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 19th, century, experiment, france, french, invention, men, music, recording, sound, testing