Sound waves

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Description

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

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