Evaluation of Subtle Auditory Impairments with Multiple Audiological Assessments in Normal Hearing Workers Exposed to Occupational Noise
Recent studies involving guinea pigs have shown that noise can damage the synapses between the inner hair cells and spiral ganglion neurons, even with normal hearing thresholds—which makes it important to investigate this kind of impairment in humans. The aim was to investigate, with multiple audiol...
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MDPI AG
2023-06-01
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| Series: | Brain Sciences |
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| Online Access: | https://www.mdpi.com/2076-3425/13/6/968 |
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| author | Alessandra Giannella Samelli Clayton Henrique Rocha Mariana Keiko Kamita Maria Elisa Pereira Lopes Camila Quintiliano Andrade Carla Gentile Matas |
| author_facet | Alessandra Giannella Samelli Clayton Henrique Rocha Mariana Keiko Kamita Maria Elisa Pereira Lopes Camila Quintiliano Andrade Carla Gentile Matas |
| author_sort | Alessandra Giannella Samelli |
| collection | DOAJ |
| description | Recent studies involving guinea pigs have shown that noise can damage the synapses between the inner hair cells and spiral ganglion neurons, even with normal hearing thresholds—which makes it important to investigate this kind of impairment in humans. The aim was to investigate, with multiple audiological assessments, the auditory function of normal hearing workers exposed to occupational noise. Altogether, 60 workers were assessed (30 in the noise-exposure group [NEG], who were exposed to occupational noise, and 30 in the control group [CG], who were not exposed to occupational noise); the workers were matched according to age. The following procedures were used: complete audiological assessment; speech recognition threshold in noise (SRTN); speech in noise (SN) in an acoustic field; gaps-in-noise (GIN); transient evoked otoacoustic emissions (TEOAE) and inhibitory effect of the efferent auditory pathway; auditory brainstem response (ABR); and long-latency auditory evoked potentials (LLAEP). No significant difference was found between the groups in SRTN. In SN, the NEG performed worse than the CG in signal-to-noise ratio (SNR) 0 (<i>p</i>-value 0.023). In GIN, the NEG had a significantly lower percentage of correct answers (<i>p</i>-value 0.042). In TEOAE, the NEG had smaller amplitude values bilaterally (RE <i>p</i>-value 0.048; LE <i>p</i>-value 0.045) and a smaller inhibitory effect of the efferent pathway (<i>p</i>-value 0.009). In ABR, the NEG had greater latencies of wave V (<i>p</i>-value 0.017) and interpeak intervals III-V and I-V in the LE (respective <i>p</i>-values: 0.005 and 0.04). In LLAEP, the NEG had a smaller P3 amplitude bilaterally (RE <i>p</i>-value 0.001; LE <i>p</i>-value 0.002). The NEG performed worse than the CG in most of the assessments, suggesting that the auditory function in individuals exposed to occupational noise is impaired, even with normal audiometric thresholds. |
| first_indexed | 2024-03-11T02:41:09Z |
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| institution | Directory Open Access Journal |
| issn | 2076-3425 |
| language | English |
| last_indexed | 2024-03-11T02:41:09Z |
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| spelling | doaj.art-d0abb609568b475bac883d8eddc5ca5d2023-11-18T09:37:06ZengMDPI AGBrain Sciences2076-34252023-06-0113696810.3390/brainsci13060968Evaluation of Subtle Auditory Impairments with Multiple Audiological Assessments in Normal Hearing Workers Exposed to Occupational NoiseAlessandra Giannella Samelli0Clayton Henrique Rocha1Mariana Keiko Kamita2Maria Elisa Pereira Lopes3Camila Quintiliano Andrade4Carla Gentile Matas5Department of Physical Therapy, Speech-Language-Hearing Sciences, and Occupational Therapy, Medical School (FMUSP), University of São Paulo, São Paulo 05360-160, SP, BrazilDepartment of Physical Therapy, Speech-Language-Hearing Sciences, and Occupational Therapy, Medical School (FMUSP), University of São Paulo, São Paulo 05360-160, SP, BrazilDepartment of Physical Therapy, Speech-Language-Hearing Sciences, and Occupational Therapy, Medical School (FMUSP), University of São Paulo, São Paulo 05360-160, SP, BrazilDepartment of Physical Therapy, Speech-Language-Hearing Sciences, and Occupational Therapy, Medical School (FMUSP), University of São Paulo, São Paulo 05360-160, SP, BrazilDepartment of Physical Therapy, Speech-Language-Hearing Sciences, and Occupational Therapy, Medical School (FMUSP), University of São Paulo, São Paulo 05360-160, SP, BrazilDepartment of Physical Therapy, Speech-Language-Hearing Sciences, and Occupational Therapy, Medical School (FMUSP), University of São Paulo, São Paulo 05360-160, SP, BrazilRecent studies involving guinea pigs have shown that noise can damage the synapses between the inner hair cells and spiral ganglion neurons, even with normal hearing thresholds—which makes it important to investigate this kind of impairment in humans. The aim was to investigate, with multiple audiological assessments, the auditory function of normal hearing workers exposed to occupational noise. Altogether, 60 workers were assessed (30 in the noise-exposure group [NEG], who were exposed to occupational noise, and 30 in the control group [CG], who were not exposed to occupational noise); the workers were matched according to age. The following procedures were used: complete audiological assessment; speech recognition threshold in noise (SRTN); speech in noise (SN) in an acoustic field; gaps-in-noise (GIN); transient evoked otoacoustic emissions (TEOAE) and inhibitory effect of the efferent auditory pathway; auditory brainstem response (ABR); and long-latency auditory evoked potentials (LLAEP). No significant difference was found between the groups in SRTN. In SN, the NEG performed worse than the CG in signal-to-noise ratio (SNR) 0 (<i>p</i>-value 0.023). In GIN, the NEG had a significantly lower percentage of correct answers (<i>p</i>-value 0.042). In TEOAE, the NEG had smaller amplitude values bilaterally (RE <i>p</i>-value 0.048; LE <i>p</i>-value 0.045) and a smaller inhibitory effect of the efferent pathway (<i>p</i>-value 0.009). In ABR, the NEG had greater latencies of wave V (<i>p</i>-value 0.017) and interpeak intervals III-V and I-V in the LE (respective <i>p</i>-values: 0.005 and 0.04). In LLAEP, the NEG had a smaller P3 amplitude bilaterally (RE <i>p</i>-value 0.001; LE <i>p</i>-value 0.002). The NEG performed worse than the CG in most of the assessments, suggesting that the auditory function in individuals exposed to occupational noise is impaired, even with normal audiometric thresholds.https://www.mdpi.com/2076-3425/13/6/968noiseoccupationalcochleaauditory perceptual disordershearing tests |
| spellingShingle | Alessandra Giannella Samelli Clayton Henrique Rocha Mariana Keiko Kamita Maria Elisa Pereira Lopes Camila Quintiliano Andrade Carla Gentile Matas Evaluation of Subtle Auditory Impairments with Multiple Audiological Assessments in Normal Hearing Workers Exposed to Occupational Noise Brain Sciences noise occupational cochlea auditory perceptual disorders hearing tests |
| title | Evaluation of Subtle Auditory Impairments with Multiple Audiological Assessments in Normal Hearing Workers Exposed to Occupational Noise |
| title_full | Evaluation of Subtle Auditory Impairments with Multiple Audiological Assessments in Normal Hearing Workers Exposed to Occupational Noise |
| title_fullStr | Evaluation of Subtle Auditory Impairments with Multiple Audiological Assessments in Normal Hearing Workers Exposed to Occupational Noise |
| title_full_unstemmed | Evaluation of Subtle Auditory Impairments with Multiple Audiological Assessments in Normal Hearing Workers Exposed to Occupational Noise |
| title_short | Evaluation of Subtle Auditory Impairments with Multiple Audiological Assessments in Normal Hearing Workers Exposed to Occupational Noise |
| title_sort | evaluation of subtle auditory impairments with multiple audiological assessments in normal hearing workers exposed to occupational noise |
| topic | noise occupational cochlea auditory perceptual disorders hearing tests |
| url | https://www.mdpi.com/2076-3425/13/6/968 |
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