2 - audiometry (AHPs)

Question 1

what is pure tone & warbal tone?

Answer 1

pure tone = single frequency
warbal tone = more than 1 frequency

Question 2

what used to measure air conduction threshold?

Answer 2

headphones & insert earphones
= assess entire auditory pathway

Question 3

what used to measure bone conduction thresholds?

Answer 3

bone transducers - bypass external&middle ear just stimulating inner ear

Question 4

what is mild, moderate, severe & profound hearing loss?

Answer 4

mild hearing loss - 20-40 dBHL

moderate - 41-70

severe - 71-95

profound - 95+

Question 5

what is masking in audiometry test?

Answer 5

• can be hard to know which ear sound coming from, if have good ear & bad ear then good ear will just listen more to compensate
• masking os when narrow band masking noise is used to distract good ear so like force bad ear to be tested

Question 6

what are 3 types of hearing loss?

Answer 6

1. sensorineural
2. conductive
3. mixed

Question 7

what is sensorineural hearing loss?

Answer 7

• also known as sensory/cochlear/inner ear hearing loss
• permanent SNHL can be from damaged hair cells in cochlea or CN VIII nerve

caused by prolonged exposure to loud noise, ototoxic drugs, certain diseases, birth complications, benign tumours of auditory nerve, genetics

Question 8

what is conductive hearing loss?

Answer 8

= sound not being able to pass to inner ear

caused by ear infections, middle ear fluid (glue ear), perforated ear drum

Question 9

what is mixed hearing loss?

Answer 9

combination of both damage to outer&middle ear and inner ear

caused by genetic, birth defects, infections, tumour etc

Question 10

what is tympanometry?

Answer 10

assessment of conduction through eardrum (assess middle ear) - not hearing test but energy transmission test