The wavelength remains the same. There is another important property of waves which is called their frequency . Frequency tells you how many times a wave repeats itself in one second. Frequency is measured in units called Hertz or Hz . A high frequency sound is high pitched, whilst a low frequency sound is low pitched.
Waves can do several things.
This is when a wave bounces off an object. It is easy to understand if we look at what happens to light when it reflects off a mirror. When sound is reflected from a surface we call it an echo . Refracted This is when a wave passes from air into glass or water and changes direction as it slows down. In general, refraction happens when a wave passes from a less dense material into a denser material.