Reflection and Refraction of Sound

Things to remember

• The repetition of sound, which is reflected from walls of large room or distant surface is called echo.
• If the distance between the source of sound and reflecting body is less than 17m, original sound and reflected sound mix and the sound is prolonged. This process is known as reverberation.
• A sound which produces an unpleasant and jarring effect on the ear is called noise.
• The sound which produces a pleasing sensation on the ear is called musical sound.