Functions of Middle ear

Functions of Middle ear:

(i) Due to the pressure changes produced by sound waves, the tympanic membrane vibrates, i.e., it moves in and out of the middle ear. Thus the tympanic membrane acts as a resonator that reproduces the vibration of sound,

(ii) It transmits sound waves from external to the internal ear through the chain of ear ossicles,

(iii) The intensity of sound waves is increased about twenty times by the ear ossicles. It may be noted that the frequency of sound does not change and

(iv) From the tympanic cavity extra sound is carried to the pharynx through Eustachian tube.