AAO-HNSF Certificate Program for Otolaryngology Personnel

Masking – Bone Conduction • How does sound cross to the other ear? –Testing with the bone oscillator sets the bones of the skull into vibration. –This vibration stimulates both cochleas.

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

16

Masking – Bone Conduction • The interaural attenuation when using the bone oscillator is 0 dB. • Cross-over – when the stimulus presented to the test ear is heard in the non-test ear.

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

17

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

18