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The high-pitch notched audiogram: a cohort of patients without causative noise-induced hearing loss
1Private otolaryngology practice (retired), Hobart, Tasmania, Australia.
Background:
One still encounters opinion that hearing loss with high-pitch notched audiogram is invariably due to noise-induced hearing loss. This paper tests this misapprehension.
Methods:
A study was conducted of patients identified in a prospective manner with notched audiograms but no history of noise exposure occurring in an otolaryngological practice over a 20-year period.
Results:
A cohort of 26 hearing loss patients, in whom notched audiograms were not associated with historical evidence of noise exposure, was documented.
Conclusion:
The findings confirm that a notched audiogram is not pathognomonic of noise-induced hearing loss.
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