Physics

What is Reflection of Sound?

The reflection of sound follows the law “angle of frequency equals angle of reflection”, it also called the law of reflection.

Take two metal tubes A and B. Keep one end of each tube on a metal plate as shown in Figure. Place a wrist watch at the open end of the tube A and interpose a cardboard between A and B. Now at a particular inclination of the tube B with the cardboard, ticking of the watch is clearly heard. The angle of reflection made by the tube B with the cardboard is equal to the angle of incidence made by the tube A with the cardboard.

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Reflection of sound is used in many procedures. For example; megaphone, loudspeaker, horn, stethoscope, hearing aid, sound board etc.