AAO-HNSF Certificate Program for Otolaryngology Personnel

Hood Method (Continued) –Re-establish threshold –If there is no change, increase masking by 5 dB –Re-establish threshold –If there is no change, record as threshold

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

25

Why use the Hood Method? Goal of audiogram—gain ear specific information

Goal of plateau—establish level at which the threshold remains unchanged in the presence of a changing masking level

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

26

Masking Examples –Air Conduction

Do you need to mask? Is the difference between ears  40 dB?

NO NO

250 Hz 500 Hz

15 – 10  40? 20 – 15  40?

NO

1000 Hz

30 – 20  40?

YES NO YES NO

2000 Hz 3000 Hz 4000 Hz 6000 Hz 8000 Hz

70 – 35  40? 80 – 40  40? 90 – 55  40? 90 – 40  40? 90 – 30  40?

YES

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

27