Question

In a stethoscope, the sound of heartbeats travels through the stethoscope tube.

• A. by bending along the tube
• B. in a straight line
• C. by undergoing multiple reflection
• D. as a sonic boom

Answer 1

The correct option is C

by undergoing multiple reflection

1. Sound can get reflected a number of times before reaching us. In multiple reflections of sound waves, they add up, and the loudness increases.
2. In a stethoscope, the sound of a patient’s heartbeat is guided along the tube to the doctor's ears by multiple reflections.
3. The figure below describes the multiple reflections in the stethoscope.

Hence, option (C) is the correct answer.