Stethoscope
device · 1816 · Industrial Revolution
An instrument for listening to the heart and lungs (Laennec).
Inventor: René Laenne.
What it is made of
- Diaphragm — has part. A diaphragm.
Principles and materials it uses
- Sound wave — uses. It transmits sound.
- Wood — is made of. Laennec’s stethoscope is a wooden tube.
Where it is used
- Blood pressure monitor — is used in. Listening for the Korotkov sounds.