AAO-HNSF Certificate Program for Otolaryngology Personnel

When to mask for bone conduction? If the air-bone gap  10 dB, MASK! Air-bone gap – the difference between the air conduction threshold and the bone conduction threshold at the same frequency.

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

10

When to mask for bone conduction?

LEFT

3000

250

500

1000 2000

4000

8000

0

0 10 20 30 40 50 60 70 80 90

10 20 30 40 50 60 70 80 90

X

X

X X

X

X

X

Ex. AC – 30 dB, BC – 10 dB

100 110 120

100 110 120

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

11

When to mask for speech testing?

Factors –Presentation level of speech signal to the test ear –Interaural attenuation –Bone conduction of the non-test ear –Type of speech measure

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

12