They are acoustic, inside is a diaphram that vibrates and amplifies sound passing it through the hollow tubes.
The function of the tubing in a stethoscope is to magnify the sound waves by making them narrow enough to be heard at an accurate timing through the ear canal.
An instrument used to magnify sound
The doctor used his stethoscope to listen to the sound of your heatbeat
vibrations of sound
A microphone.
it is based on refraction of sound
because of science
Parabolic sound reflectors, Speaking tubes and Stethoscope
No, the sound is bouncing not following a straight line.
A stethoscope.
A stethoscope consists of two equal-length tubes of air, physicallyjoined, which conduct sound waves to the examiner's ears.
When a doctor or nurse places a stethoscope diaphragm on a patient's chest, sound waves traveling through the patient's body cause the flat surface of the diaphragm to vibrate.When a doctor or nurse places a stethoscope diaphragm on a patient's chest, sound waves traveling through the patient's body cause the flat surface of the diaphragm to vibrate.