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 topic will be examined in the higher tier papers only.
Key Words
moving-coil microphone, longitudinal, wavelength, sound, rarefaction, ear, ear drum, cochlea, wave, auditory nerve, frequency, brain, speed, microphone, compression
