Audition Flashcards
What is phase
Phase is the relationship between peaks and trough
In phase the when waves line up can be different amplitudes
What is amplitude
the maximum extent of a vibration or oscillation(height)
What is a trough
Lowest part of a wave
What is a crest
Highest point in a wave
What does bigger amplitude mean in terms of sound
Louder sounds
What does the meatus do?
It applies sound in the ear
What is sound
Sound is air moving to fluid in the ear
What does the middle ear do?
Manages the impedance mismatch caused by outer ear causing loss to sensitivity of sound
How does the middle ear work
Malleus, Incus and stapes are bones that clash against each together to transmit signals
cochlea
Has different segments filled up with different types of fluid
corti
Structure in the cochlea where waves land and displacement of cochlear fluid and movement of hair cells at the Corti to produce electrochemical signals.
Stereo-cilia
These are inner and outer hair cells that act as mechano-transducers which contract and boost vibrations of the membrane
Basilar membrane
Apart of the hearing structure in which the lower end is tuned for higher frequencies and the higher end is tuned for lower frequencies
It can take the sound and split it into its frequencies
Topographical mapping
Vibrations being overlapped into a decomposition of the sound splitting the frequencies
How can you represent waves
As a time domain or a frequency domain
sinusoidal
having the form of a sine curve.
kinocilium
Branched out structure that can move and allows mechanical sodium channels to open
Hair cells
Potassium enters cell through cilia causing depolarisation
Calcium ions enter through channels and activates potassium channels to leave the cell(depolarising)
Causing electrical resonance
Endolymph
Contains high concentration of potassium ions and perilymph contains low potassium ion to create a basal
How does auditory vision travel to the brain stem
Parallel
MSO(Medial sup olive)
Computes location of the sound by arrival time in different ears
MSO codes time delay
EE and EL cells
EE cells are excited by both ears
El cells are excited by one ears
