Objectives: Guidelines published in 2000 by the authors are widely used by medical and legal professionals in the UK for diagnosis of noise-induced hearing loss in a medicolegal context. However, they cannot be used for quantification of the noise-induced hearing loss, which is required in most cases. This requirement is addressed.
Design: A method is developed here to quantify noise-induced hearing loss, thereby overcoming this shortcoming.
Setting: Assessment of noise-induced hearing loss in medicolegal cases.
Participants: A consecutive series of 124 cases of noise-induced hearing loss is used for evaluation.
Main Outcome Measure: Magnitude of noise-induced hearing loss based on hearing threshold levels averaged over the frequencies 1, 2 and 3 kHz.
Results: The rationale of the method, practical application and three worked examples are developed. A simpler short-cut method is developed and shown to be equivalent to the full method in most cases.
Conclusions: The method offers a practical approach to quantification of noise-induced hearing loss.
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