Question

In a stethoscope, sound of heart beats travel through stethoscope tube
(A). by bending along the tube
(B). In a straight line
(C). Undergoing multiple reflections
(D). All of the above

Answer 1

Hint :Heart beats are of high pitch and travel at very high frequencies and this would cause a lot of pressure variation. So it just undergoes multiple reflections. Inside the tube there is multiple reflection, which tends to occur as a result of wave collision within the wall of a tube. Hence multiple reflection takes place and continues till it reaches the ear tips.

Complete Step By Step Answer:
In the given question, if we are talking about stethoscopes, it is generally made up of rubber and is used to listen to sounds produced within the body.
Stethoscopes basically work on the principle of multiple refraction of sound. For heart beats, Cardiology stethoscope is used.
In this there is a disc shaped resonator placed against the skin and it contains two earplugs.it contains two ear tips and a bell.
When it is placed over the chest of a person it produces vibrations on the flat surface of the stethoscope diaphragm. This vibration is just picked up by the diaphragm and is prevented by the tube which does not allow to make any sound loss. Inside the tube there is multiple reflection, which tends to occur as a result of wave collision within the wall of a tube. Hence multiple reflection takes place and continues till it reaches the ear tips.
Heart beats are of high pitch and travel at very high frequencies and this would cause a lot of pressure variation.
So it just undergoes multiple reflections.
So option C is the correct answer.

Note :
Stethoscopes basically work on the principle of multiple refraction of sound. For heart beats, Cardiology stethoscope is used. In this there is a disc shaped resonator placed against the skin and it contains two earplugs.it contains two ear tips and a bell. Heart beats are of high pitch and travel at very high frequencies and this would cause a lot of pressure variation