Navegando por Palavras-chave "Occupational"

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    Avaliação audiológica em funcionários de um hospital público expostos a ruído
    (CEFAC Saúde e Educação, 2014-06-01) Iizuka, Letícia Yurie; Gil, Daniela [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Purposeto characterize and to compare the hearing of employees of a public hospital exposed to maximum occupational noise levels above and below 85dB(A). Methodthis clinical study selected 39 workers of a public hospital, divided according to the level of noise exposure: 20 subjects with maximum exposure levels above 85dB(A) (Group 1) and 19 individuals with maximum exposure levels below 85dB(A) (Group 2). Basic audiological evaluation, transient and distortion product otoacoustic emissions were carried out. Resultboth groups presented normal hearing thresholds. However, 87.5% in Group 1 and 60.5% in Group 2 showed absent responses in transient evoked otoacoustic emissions, with statistical difference. Group 2 showed higher signal/noise ratios also in distortion product otoacoustic emissions, and only the frequency of 6 kHz was abnormal in both groups. Conclusionsound pressure levels and noise exposure time did not influence in pure tone thresholds. The higher the sound pressure level and the longer the exposure time, more altered the otoacoustic emissions, indicating cochlear dysfunction.
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    Sound localization and occupational noise
    (Hospital Clinicas, Univ São Paulo, 2014-01-01) Menezes, Pedro de Lemos; Lira de Andrade, Kelly Cristina; Lins Carnauba, Aline Tenorio; Cabral, Frantania B.; Leal, Mariana de Carvalho; Pereira, Liliane Desgualdo [UNIFESP]; Univ Estadual Ciencias Saude Alagoas UNCISAL; Universidade Federal de Pernambuco (UFPE); Universidade Federal de São Paulo (UNIFESP)
    OBJECTIVE: the aim of this study was to determine the effects of occupational noise on sound localization in different spatial planes and frequencies among normal hearing firefighters.METHOD: A total of 29 adults with pure-tone hearing thresholds below 25 dB took part in the study. the participants were divided into a group of 19 firefighters exposed to occupational noise and a control group of 10 adults who were not exposed to such noise. All subjects were assigned a sound localization task involving 117 stimuli from 13 sound sources that were spatially distributed in horizontal, vertical, midsagittal and transverse planes. the three stimuli, which were square waves with fundamental frequencies of 500, 2,000 and 4,000 Hz, were presented at a sound level of 70 dB and were randomly repeated three times from each sound source. the angle between the speaker's axis in the same plane was 45, and the distance to the subject was 1 m.RESULT: the results demonstrate that the sound localization ability of the firefighters was significantly lower (p < 0.01) than that of the control group.CONCLUSION: Exposure to occupational noise, even when not resulting in hearing loss, may lead to a diminished ability to locate a sound source.