technologies/disorders - ear

Question 1

main words for ear; the function of the ear

Answer 1

Sound waves are directed into the outer ear canal by the pinna and set up vibrations of identical frequency in the eardrum

• to send sound waves and differing wavelengths and frequencies, amplitude

Question 2

what makes up the outer ear

Answer 2

• auricle: external visible fleshy organ (channels sound waves coming in ear)
• auditory canal: channels waves towards tympanic membrane/ear drum
• tympanic membrane (ear drum) - thin membrane between outer and middle ear –> vibrates in response to sound, vibrates at same frequency

Question 3

what makes up the middle ear

Answer 3

the ear ossicles; vibrate one another to magnify/amplify vibrations from tympanic membrane transferring to cochlear
- hammer, anvil, stirrup

oval window; holds fluid in cochlea; receives vibrations from tympanic membrane via ossicles, sends waves thro cochlea

Question 4

what makes up the inner ear

Answer 4

the cochlea - structure filled with fluid.

main structure is organ of curti which contains hair cells that produce the nerve impulses sent to brain

Question 5

inner ear

what is the organ of curti - explain

Answer 5

within the cochlea

• a structure that contains hair cells and produces nerve impulses to brain
• it sits on top of basillar membrane and below tectorial membrane

when the basillar membrane moves, the hair cells will bend and rub against the tectorial membrane

bending of the hair cells will generate the nerve impulses which will be sent along the auditory nerve to the brain. the brain will then interpret this sound

Question 6

what does the auditory nerve do (last structure)

Answer 6

sends electrical impulse to brain

Question 6

hearing loss type 1. A

Answer 6

Auditory processing disorder; brain unable to process sound

Question 6

hearing loss type 2; c

Answer 6

conductive hearing loss; outer/middle ear probs

Question 6

hearing losss type 3. s

Answer 6

sensorineural hearing loss; inner ear prob likely to do with hair cells

Question 7

hearing techology; hearing aids. what are they used for?

Answer 7

conductive and sensorineural hearing loss. Must have some residual hearing

Question 8

components of hearing aids

Answer 8

• microphone picks up sounds from env
• computer chiop w amplifier converts sound waves to electrical waves
• adjusts sound to hearing loss thro the speaker

Question 9

what r pros of hearing aids

Answer 9

-accessible
-affordable
-able to be programmed to amplify certain frequencies -> based on hearing test determination

Question 10

what are bone conduction implants utilised for

Answer 10

for middle ear issues/conductive hesring loss

Question 11

components of bone conduction

Answer 11

• external comp; sound processor which detects sound from env and sends signal to vibrate bones, moval the oval window
• internal comp; the surgical implant in the skull

Question 12

what r cochlear impants used for

Answer 12

it aids in sensorineural hearing loss/ the inner ear damage

Question 13

cochlear implants structure

Answer 13

small electronic device implanted in inner ear

external; includes microphone that receives sound waves which r digitalised thro speech processor –> sent to transmitter which converts signal into electrical impulses

internal; (receiver and electrodes) electrical impulses received by reciever and sent to electrodes implemented in ear

Question 14

limitations of all 3

Answer 14

hearing aid; cant aid someone w no hearing
cochlear implants; surger nerve wrecking/doesnt replicate normal hearing

bone conduction; requires functioning inner ear, surgery risks