AAO-HNSF Certificate Program for Otolaryngology Personnel

Masking Dilemma Masking Dilemma

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

37

Masking Examples

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

NO NO NO

250 Hz 15 – 10  40? 500 Hz 20 – 15  40? 1000 Hz30 – 20  40? 2000 Hz70 – 35  40? 3000 Hz 80 – 40  40? 4000 Hz 90 - 55  40? 6000 Hz 90 – 40  40? 8000 Hz 90 – 30  40?

NO YES

NO

YES YES

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

38

Masking Examples

How much masking? Air conduction threshold in the non-test ear + 15 dB = Effective Masking

55 55 45

3000 Hz 40 + 15 dB = 6000 Hz 40 + 15 dB = 8000 Hz 30 + 15 dB =

dB EM dB EM dB EM

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

39