Hearing And Hearing Loss

Question 0

What does db measure?

Answer 0

The intensity of sound

Question 1

How is sound produced?

Answer 1

Pressure changes in the air

Question 2

What does dBSPL measure?

Answer 2

Sound pressure level.

Question 3

What does dBHL measure?

Answer 3

Hearing level. It is used for pure tone audiograms.

The norm threshold frequency is odBHL

Question 4

What does dBA measure?

Answer 4

This is for sound field assessment

Question 5

How does the middle ear amplify sound?

Answer 5

Hydraulic multiplication (the size difference between the eardrum and stapes footplate causes increased pressure)
Lever action of the ossicles
The way the tympanic membrane buckles

Question 6

What is the function of the estachain tube?

Answer 6

Allows us to have equal pressure either side

Question 7

What are the tree chambers in the ear called?

Answer 7

Scala vestibuli
Scala tympani
Cochlear duct

Question 8

What is the liquid called in the Scala vestibuli and the Scala tympani ?

Answer 8

Perilpmh

Question 9

What is the liquid called in the cochlear duct ?

Answer 9

Enodolymph

Question 10

What is the base of the basilar membrane like?

Answer 10

Thin and stiff

Question 11

What is the base of the apex of the basilar membrane like?

Answer 11

Wide and less stiff

Question 12

What are the outer hair cells responsible for?

Answer 12

Fine tuning in the cochlear

Question 13

What does an audiograms measure?

Answer 13

Sensitivity across frequency
Threshold of hearing
Air conduction and bone conduction
Severity, shape and type of hearing loss for each ear

Question 14

He can you tell if someone has a conduction loss on an audiogram?

Answer 14

If bone conduction is normal but there is a loss of hearing in air conduction

Question 15

What type of hearing loss does well with hearing aids?

Answer 15

Conductive loss

Question 16

What are the causes of a conductive loss?

Answer 16

Fluid in the middle ear
Otosclerosis (abnormal bone growth in middle ear) 
Ear infection 
Poor Eustachian tube function
Presence if a foreign body
Malformation of outer ea

Question 17

Causes of sensorineural hearing loss

Answer 17

Presbycusis 
Noise exposure 
Ménière's disease 
Trauma 
Vestibular neuronitis 
Tumors 
Autoimmune 
Meningitis 
Oxotoxicity

Question 18

Other factors affecting communication with hearing loss

Answer 18

Loss of confidence 
Tinnitus 
Localisation
Loudness roller tolerance 
Speech development 
Problems monitoring speech sounds and sounds during speech