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10.6.18 Testing for conductive loss of hearing


As previously indicated, conductive loss is that which involves the outer and/or middle ear. The pathway of sound waves conducted through this passage is interrupted. Therefore, bone conduction levels will be more normal than those from air conduction.

In this audiogram, bone conduction levels show normal hearing ['()'], while air conduction levels ('X' and 'O') show a loss.

The results of this audiogram indicate that the neural system is not causing the loss, but there is some form of impairment in either the auditory canal or middle ear.

Therefore, this form of loss will not be due to noise exposure. However, depending on the history of the condition, a claim for conductive hearing loss may still be compensable.