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Indexed/Abstracted in: EMBASE, Scopus
Online ISSN 1827-188X
Università degli Studi - Torino Dipartimento di Fisiopatologia Clinica Sezione di ORL II
The evaluation of noise-induced hearing loss should be performed on the basis of the true damage due to noise rather than to the total amount of hearing loss. Usually, in absence of other causes of hearing loss, this evaluation is simply performed by subtracting, to the values of audiometric threshold various frequencies, the amount of hearing damage expected in relation with age.
These criteria do not consider that socio-presbycusis in subjects affected by acoustic trauma has a lesser incidence than in normals and, consequently, the true incidence of professional hearing loss is underestimated.
An evaluation of hearing damage due to noise is suggested based on the difference between the percentage of the total amount of disability, determined on the basis of pure tone audiometry threshold, and the amount of disability due to age, even in this case expressed in percentage. This methodology seems to be more in accordance with the guidelines followed in the formulation of percentage evalutation of acoustic trauma.