Sound pressure recordings,19th-century artwork. These recordings (black circular areas) are produced by a process called tonography,recording on a membrane the sounds produced by different humans using a variety of musical instruments. Artwork from the 20th volume (second period of 1897) of the French popular science weekly 'La Science Illustree' | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 4760 px × 4039 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |