PSL300H1 Lecture Notes - Lecture 6: Cochlear Duct, Vestibular Duct, Tympanic Duct
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Answer: conductive hearing loss: still able to hear sound through bones of his skull. The ear is the orga of hearing and equilibrium. The external ear consists of the pinna and the ear canal, sealed at its end by the tympanic membrane, or eardrum. Beyond the eardrum is the middle ear, an air-filled space connected to the pharynx by the eustachian tube. The inner ear contains the sensors: cochlea for hearing and the vestibular apparatus for equilibrium. At the peaks of the waves, the molecules are crowded together and the pressure is high; at the troughs the molecules are far apart and the pressure is low. Frequency is the number of wave peaks per second. We perceive frequency as pitch: low frequencies as low-pitched sounds, high frequencies as high-pitched. Frequency is measured in waves per second, i. e. i hertz (hz). Humans hear sounds in the range 16 20,000 hz ~10 octaves.
