Hearing Flashcards
(18 cards)
What sense forms the basis of social communication in humans
Hearing
Define Sound
A wave of pressure travelling through an elastic medium by mechanical disturbance of the molecules of the medium
What factors does speed of sound depend on?
The elasticity and density of the medium
What is sound/acoustic pressure?
local pressure deviation from the ambient atmospheric pressure caused by a sound wave
Rarefaction causes…
a temporary decrease in local pressure
Compression causes…
a temporary increase in local pressure
What is a pure tone?
A sound with only 1 frequency of cyclical pressure variations
What is a complex sound?
A number of different pure tones
How does the inner ear and brain work together?
Inner ear decomposes complex sounds into pure tones, brain puts them back together to hear the sound as it is
Co-articulation is…
The way you say a sound depending on the sounds/letters before and after that sound (eg. pick, peck, puck)
What are the subsections of the ear?
Inner ear, Middle ear, External ear
What is the middle ear?
an air filled cavity containing 3 ossicles: malleus, incus, stapes, and the eustachian tube
What is the order of sound?
The world, external auditory canal, tympanum, malleus, incus, stapes, cochlea
What is the cochlea?
The inner ear, a fluid-filled coiled tube containing receptor cells and afferent nerves
Where is the auditory nerve?
The middle of the cochlea
What receptor cells are in the organ of corti?
stereocilia
what sounds are processed at the apex of the cochlea?
low-frequency sounds
what sounds are processed at the base of the cochlea?
high-frequency sounds
