hearing aids

Question 1

types of air conduction hearing aids and uses 2

Answer 1

open fits useful for high tone loss

moulds are required for severe losses

Question 2

complications of mould hearing adis

Answer 2

predispose to moisture and thus infection

Question 3

types of bone conduction hearing aids 3

Answer 3

hard bands

soft bands

bone anchored

Question 4

indications for bone conductive hearing aids 5

Answer 4

conductive hearing loss and no benefit from air conduction aids

discharging/infected ear

canal atresia

microtia preventing wearing of normal air conduction aids

may be to useful in sensironeual heaeirng loss to imrpove directional hearing

Question 5

implantable devices fir hearing loss

Answer 5

bone bridges and birant sound brides for hearing loss inspecific cases

-requires surgical implantation

Question 6

how does a cochlear implant work

Answer 6

1- sounds picked up by micorphone
2 speech provessor digitizes sound into signal sents to tramiitting coil

3 transmitting coil sends coded signals as radiwaves to cochlear implant

4 internal porcessor placed in mastoid bone deliverals electial energy to an array of electordes in the cochlea

5 the electordes laong the array stimulate remaining auditory nerve fibres in cochlea

6 electrical sound info sent to auditory system in brain

Question 7

when is cochlear implant indicated

Answer 7

hearing worse than or equal to 90dB at 2 and 4Hz

and

in adults if aided hearing BKB score <50%