please explain phenomenon related to reflection of sound with an example

Dear Student!!

The bouncing back of sound when it strikes a hard smooth surface is called reflection of sound.

The laws of reflection of sound is same as the reflection of light.

1. The incident sound wave, the reflected sound wave and the normal at the point of incidence, all lie in the same plane.

2. The angle of reflection of sound is always equal to the angles of incidence of sound. 

For example consider the working of stethoscope.

Stethoscope

It is a medical instrument that doctors use to check the pulse rate and heartbeats of their patients. It consists of a chest piece and a pair of earpieces connected to one another by a rubber tube. The chest piece consists of a sensitive membrane that vibrates when brought in contact with the chest. The air particles within the rubber tube vibrate because of the vibration caused in the membrane with the frequency of its source i.e., heartbeats, pulse, etc. Sound waves undergo multiple reflections inside the rubber tube before reaching the earpieces.