THE AUDIOGRAM IN HEARING LOSS DUE TO NOISE: A PROBABILITY TEST TO UNCOVER OTHER CAUSATION

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Abstract
The shape and left-right similarity of pure-tone audiograms in noise-induced hearing loss vary considerably among exposed persons, depending on the noise exposure, age, individual susceptibility and the presence or absence of other components of hearing loss of pathological origin. The amount of this variation is examined for a group of occupationally exposed subjects from which any with a diagnosable element of pathological overlay had been eliminated. Using these results it is possible, for any given individual's audiogram, to test the probability that factors other than noise exposure may have been implicated. A step-by-step procedure is outlined and numerical estimates of the probabilities are presented.

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