Rousselot's Speech Inscription Apparatus, 1895
Bildnummer 12631479
| Monsieur Rousselot of Paris has constructed an apparatus in order to investigate the differences between the dialects and the normal pronunciation of the language. Five recording devices, each connected by gutta-percha tubes to a needle which inscribes five adjacent lines on the blackened paper of a rotating drum, while a tuning fork, which is kept continuously vibrating by an electric current, draws a sixth line. The first recording drum. 1/2 inch in diameter, was placed with the diaphragm against one of the side walls of the Adams' apple and it registered the vibrations on the larynx while the subject was speaking. In order to record the movements of the tongue during speech, a second drum was placed with the diaphragm behind the subject's chin secured by a band pressing over the head. There was a separate device for each of the two lips. Its membrane was depressed whenever a highly sensitive lever was displaced by the movement of the | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Science Source |
| Bildgröße: | 4200 px × 2896 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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