How do sound waves get converted?
The visible outer ear channels the sound waves through the auditory canal o the eardrum,. The middle ear then transmits the eardrum's vibrations through a piston made of three tiny bones (hammer, anvil, stirrup) to the cochlea in the inner ear. The vibrations cause the cochlea's membrane to vibrate, jostling the fluid that fills the tube. This motion causes ripples in the basilar membrane, bending the hair cells that line its surface. These hair cells movements trigger impulses in the adjacent nerve cells, who's axons converge and form the auditory nerve, which sends neural messages (via the thalamus) to the auditory cortex.
A tight membrane that vibrates with waves in the ear
Define middle ear
The chamber between the eardrum and cochlea containing free tiny bones (hammer, anvil, and stirrup) that concentrate the vibrations of the eardrum on the cochlea's oval window.
A coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses
Define inner ear
The innermost part of the ear, containing the cochlea, semicircular canals, and vestibular sacs.
Information about hair cells...
They are very sensitive, and can detect subtle differences in sound; even enough so we can distinguish by an astounding number of voices.
What accounts for most hearing loss
damage to hair cells.
What does ringing in the ear indicate
That we have damage dour hair cells
How does the brain interpret loudness?
By the number of activated hair cells.