Audiological assessment
The audiological assessment was performed by conventional pure tone audiometer, in an inter acoustics audiometer. Todetermine the severity of hearing loss, the criteria pro-posed by BIAP ---Bureau Internacional d’Audio Phonologie---an institution formed by several associations of Europeancountries with the main objective of guiding the activityof professionals in these regions, were used. The means ofhearing thresholds in dB in air conduction, at 500 Hz, 1 kHz,2 kHz and 4 kHz and the 02/1 1997 recommendations wereanalyzed, both the right and left ears were evaluated fora group of individuals with a history of occupational noiseand the group of individuals with no history of occupational noise