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Mod 24
Hearing
| Term | Definition |
|---|---|
| frequency (wavelength) | Pitch |
| Low frequency | = Low pitch |
| High frequency | = High pitch |
| Amplitude (height) | Volume |
| Low amplitude | = Quiet |
| High amplitude | = Loud |
| Auditory Canal (The Outer Ear) | funnels sound waves from the pinna to the tympanic membrane (ear drum) |
| Tympanic Membrane (Eardrum) (The Middle Ear) | thin layer of tissue that vibrates in response to sound waves. |
| Ossicles ( The Middle Ear) | 3 bones of the middle ear: the incus, the malleus and the stapes/ transfer the sound wave from the eardrum to the oval window |
| Oval Window ( The Inner Ear) | opening of the cochlea. / vibrates when it receives the sound waves and causes the fluid inside the cochlea to move. |
| Cochlea (The Inner Ear) | Coiled, bony, fluid-filled tube containing semicircular canals/ Fluid vibrations trigger nerve impulses |
| Basilar Membrane (The Inner Ear) | Overlays the cochlea/ Ripples cause hair cells (cilia) to vibrate/ This is where transduction occurs! |
| Auditory Nerve ( The Inner Ear) | Carries neural impulses to thalamus→temporal lobe |
| Sensorineural (Hearing Loss) | Damage to the cochlea’s hair cell receptors or the auditory nerve / people may hear sound but have trouble discerning what someone is saying. Conduction |
| (Hearing Loss) | Damage to the mechanical system- eardrum and middle ear bones/ Less common |
| Frequency Theory | Basilar membrane vibrates in synchrony with the pitch (wavelength) |
| Place Theory | Each area along the basilar membrane is tuned to a specific frequency of a sound wave |
Created by:
Sophia154
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