Sound waves



Sound waves are of course what allow us to hear.  This video first recaps the way in which a sound wave travels through a material (such as air) before going on to explain the processes which allow humans and other animals to hear.

Please note that this is a higher tier-only video.

Key Words

rarefaction, hair cells, ear, ear drum, base, cochlea, wave, auditory nerve, frequency, brain, speed, microphone, compression, moving-coil microphone, longitudinal, wavelength, sound, apex