AAO-HNSF Certificate Program for Otolaryngology Personnel

Masking Examples –Air Conduction

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

50 55 70 55 45

2000 Hz 35 + 15 dB = 3000 Hz 40 + 15 dB = 4000 Hz 55 + 15 dB = 6000 Hz 40 + 15 dB = 8000 Hz 30 + 15 dB =

dB EM dB EM dB EM dB EM dB EM

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

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Do you need to mask? Is there an air-bone gap  10 dB? Left Ear 250 Hz 15 – 5  10? 500 Hz 20 – 15  10? 1000 Hz 30 – 25  10? 2000 Hz 70 – 45  10? 3000 Hz 80 – 35  10? 4000 Hz 90 - 55  10? Masking Examples – Bone Conduction Yes No No Yes Yes Yes

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

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

250 Hz 10 + 30 + 15 = dB EM 2000 Hz 35 + 15 dB = dB EM 3000 Hz 40 + 15 dB = dB EM 4000 Hz 55 + 15 dB = dB EM 55 50 55 70

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

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