Sound localization and occupational noise

Sound localization and occupational noise

Author Menezes, Pedro de Lemos Google Scholar
Lira de Andrade, Kelly Cristina Google Scholar
Lins Carnauba, Aline Tenorio Google Scholar
Cabral, Frantania B. Google Scholar
Leal, Mariana de Carvalho Google Scholar
Pereira, Liliane Desgualdo Autor UNIFESP Google Scholar
Institution Univ Estadual Ciencias Saude Alagoas UNCISAL
Universidade Federal de Pernambuco (UFPE)
Universidade Federal de São Paulo (UNIFESP)
Abstract 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.
Keywords Noise
Occupational
Sound Localization
Hearing
Language English
Sponsor Research Support Foundation of Alagoas State (FAPEAL)
Date 2014-01-01
Published in Clinics. São Paulo: Hospital Clinicas, Univ São Paulo, v. 69, n. 2, p. 83-86, 2014.
ISSN 1807-5932 (Sherpa/Romeo, impact factor)
Publisher Hospital Clinicas, Univ São Paulo
Extent 83-86
Origin http://dx.doi.org/10.6061/clinics/2014(02)02
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000331931800002
SciELO ID S1807-59322014000200083 (statistics in SciELO)
URI http://repositorio.unifesp.br/handle/11600/37197

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