[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.00,0:00:03.98,Default,,0000,0000,0000,,PRESENTER: Sound waves\Nentering the ear travel
Dialogue: 0,0:00:03.98,0:00:06.35,Default,,0000,0000,0000,,through the external\Nauditory canal
Dialogue: 0,0:00:06.35,0:00:11.06,Default,,0000,0000,0000,,before striking the eardrum\Nand causing it to vibrate.
Dialogue: 0,0:00:11.06,0:00:14.28,Default,,0000,0000,0000,,The eardrum is connected\Nto the malleus,
Dialogue: 0,0:00:14.28,0:00:18.56,Default,,0000,0000,0000,,one of three small\Nbones of the middle ear,
Dialogue: 0,0:00:18.56,0:00:20.90,Default,,0000,0000,0000,,also called the hammer.
Dialogue: 0,0:00:20.90,0:00:24.74,Default,,0000,0000,0000,,It transmits sound vibrations\Nto the incus, which
Dialogue: 0,0:00:24.74,0:00:27.35,Default,,0000,0000,0000,,passes them to the stapes.
Dialogue: 0,0:00:27.35,0:00:30.83,Default,,0000,0000,0000,,The stapes pushes in and\Nout against the structure
Dialogue: 0,0:00:30.83,0:00:33.35,Default,,0000,0000,0000,,called the oval window.
Dialogue: 0,0:00:33.35,0:00:36.71,Default,,0000,0000,0000,,This action is passed\Non to the cochlea,
Dialogue: 0,0:00:36.71,0:00:39.92,Default,,0000,0000,0000,,a fluid-filled,\Nsnail-like structure that
Dialogue: 0,0:00:39.92,0:00:44.75,Default,,0000,0000,0000,,contains the organ of Corti,\Nthe organ for hearing.
Dialogue: 0,0:00:44.75,0:00:49.64,Default,,0000,0000,0000,,It consists of tiny hair\Ncells that line the cochlea.
Dialogue: 0,0:00:49.64,0:00:54.26,Default,,0000,0000,0000,,These cells translate vibrations\Ninto electrical impulses
Dialogue: 0,0:00:54.26,0:00:58.34,Default,,0000,0000,0000,,that are carried to the\Nbrain by sensory nerves.
Dialogue: 0,0:00:58.34,0:01:02.24,Default,,0000,0000,0000,,In this cut view, you can\Nsee the organ of Corti
Dialogue: 0,0:01:02.24,0:01:05.48,Default,,0000,0000,0000,,with its four rows\Nof hair cells.
Dialogue: 0,0:01:05.48,0:01:07.79,Default,,0000,0000,0000,,There is an inner\Nrow on the left
Dialogue: 0,0:01:07.79,0:01:11.99,Default,,0000,0000,0000,,and three outer\Nrows on the right.
Dialogue: 0,0:01:11.99,0:01:14.93,Default,,0000,0000,0000,,Let's watch this\Nprocess in action.
Dialogue: 0,0:01:14.93,0:01:19.64,Default,,0000,0000,0000,,First, the stapes rocks\Nagainst the oval window.
Dialogue: 0,0:01:19.64,0:01:24.03,Default,,0000,0000,0000,,This transmits waves of sound\Nthrough the cochlear fluid,
Dialogue: 0,0:01:24.03,0:01:27.77,Default,,0000,0000,0000,,sending the organ of\NCorti into motion.
Dialogue: 0,0:01:27.77,0:01:30.50,Default,,0000,0000,0000,,Fibers near the upper\Nend of the cochlea
Dialogue: 0,0:01:30.50,0:01:33.68,Default,,0000,0000,0000,,resonate to lower\Nfrequency sound.
Dialogue: 0,0:01:33.68,0:01:38.89,Default,,0000,0000,0000,,Those near the oval window\Nrespond to higher frequencies.