Question

on which principle is the working of stethoscope for best state a one word term for the text has given many occurs when sound is incident on its selling or wall ​

Answer 1

The principle is

Reflection of sound...

Answer 2

stethoscope works on the principle of multiple reflection of sound. Acoustic stethoscopes are familiar to most people, and operate on the transmission of sound from the chest piece, via air-filled hollow tubes, to the listener's ears.