The return of a sound wave in the same medium after impacting a surface such as a wall, metal sheet, or plywood is known as reflection of the sound wave. The sole need for a sound wave to be reflected is that the size of the reflecting surface exceeds the wavelength of the sound wave. The megaphone (or speaking tube) is a device that uses sound wave reflection.
What do you mean by reflection of sound? State one condition for the reflection of a sound wave. Name a device in which reflection of a sound wave is used.