HISTORY OF SOUND RECORDING

Figure 1. Phonograph from the 19^th century. 
(Picture was taken from http://www.digitalcentury.com)

 Figure 2. Manually rotated gramophone. (Image courtesy of Marie-Claude Steger) (Picture was taken from www.phono.org)

Figure 3. Acoustic sound recording. 
(Picture was taken from the book Leonard de Vries - Furcsa találmányok.)