Phonendoscope in its case dating from around 1900,England. This device was used in the early 20th century for listening to internal sounds of the body (auscultation). The sounds would be intensified by resonation of the two circular plates attached to the bell-shaped receiver. The sound would then be transmitted along the tubes to the physician's ears via the two earpieces | |
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Crédit: | Science Photo Library |
Taille de l’image : | 4949 px × 3632 px |
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