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Otorinolaringologia 1999 June;49(2):53-8

language: Italian

Relationship between pure-tone audiometry threshold and frequency range in noise-induced hearing loss

Albera R., Giotopoulos C., Cavalot A. L., Beatrice F.*, Romano C.**, Bosia S.°, Luccoli L.°°, Argentero P.°°°

Università degli Studi - Torino
II Sezione di ORL
Dipartimento di Fisiopatologia Clinica
* ASL n. 4 - S. Giovanni Bosco - Torino UOA di Otorinolaringoiatria
** Dipartimento di Traumatologia-Ortopedia- Medicina del Lavoro
° ASL n. 19 - Asti Servizio di Medicina del Lavoro
°° ASO S. Giovanni Battista - Torino UOA di Medicina del Lavoro
°°° Psicologo del Lavoro


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Background. Hearing loss evaluation in noise induced hearing loss (NIHL) is carried out on the basis of pure-tone audiometry threshold at speech frequencies. Aim of the study was evaluate, by means of a questionnaire, the range of frequencies that best correlates with auditory disability in case of NIHL.
Methods. The study was carried out on 789 subjects affected by NIHL. Each subject was submitted to pure-tone audiometry and to a questionnaire specifically created to explorate the subjective symptoms present in NIHL.
Results. Among the subjects examined 471 (60%) were affected at least by one subjective auditory problem; these subjects had a higher audiometric threshold than subjects that did not report auditory disability. The range of frequencies that best correlates with auditory disability is 0.5-1-2-3-4 KHz.
Conclusions. The results obtained demonstrates that the range of frequencies that best correlates with auditory problems in subject affected by hearing loss due to noise is 0.5-1-2-3-4 KHz. This is the frequency range actually more used in medico-legal practice.

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