Mid-19th century Phonautograph, 1872. Tuning fork vibrated by bow or iron rod, and vibration traced on cylinder coated with lampblack. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Heritage Images / Oxford Science Archive |
Taille de l’image : | 4823 px × 3621 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |