Etymology is the study of words, where they originated, their derivatives and interpretations. Mostly in writings, so I don't think a stethoscope would make a useful tool.
Depends : fingers, stethoscope, EKG.
What is the name of a person that studies derivation of
The doctor used his stethoscope to listen to the sound of your heatbeat
psychologist
This could be a linguist or an etymologist.
Can be, to listen to stomach sounds.
A stethoscope.
Stethoscope
a stethoscope
Stethoscope
A stethoscope
stethoscope