CC BY-NC-ND 4.0 · Laryngorhinootologie 2019; 98(S 02): S159
DOI: 10.1055/s-0039-1686551
Abstracts
Otology

Noise-Induced Hearing Loss and It's Individual Susceptibility

S Yin
1   Otolaryngology Institute, 6th Affiliated Hospital, Shanghai Jiao Tong University, Shanghai, China, Shanghai, China
,
H Wang
2   Otolaryngology Institute, 6th Affiliated Hospital, Shanghai Jiao Tong University, Shanghai, China
,
Z Jiang
2   Otolaryngology Institute, 6th Affiliated Hospital, Shanghai Jiao Tong University, Shanghai, China
,
S Huang
2   Otolaryngology Institute, 6th Affiliated Hospital, Shanghai Jiao Tong University, Shanghai, China
› Author Affiliations
National natural science foundation of China
 

Introduction:

To explore if and how chronic noise exposure impairs auditory processing ability and individual susceptibility.

Methods:

We investigated 9780 noise-exposed workers from 2012 to 2018. Interviews and audiology examinations were conducted and the total noise exposure was calculated. Random Forest (RF), a machine learning algorithm, was adopted to predict NIHL with 6 risk factors. We defined those with good actual hearing thresholds (AHT) but were predicted to be bad as the resistance group, and, those with bad AHT but were predicted to be well as the susceptible group. The behavioral tests (speech in noise, competing sentences, dichotic listening) and objective tests (ABR, ECochG, event-related potential, MMN) were recorded to evaluate auditory processing abilities.

Results:

5365 workers were comprised in this study (4554 male, 811 female). Audiology changes of 530 workers within 5 years showed the most susceptible frequency of NIHL arise in 12 kHz. Females had better hearing than males after adjusted for confounders. The best predictive ability of RF achieved an accuracy of 69%. The age, career length and CNE of the susceptible group were all lower while the AHT were obviously greater than that of the resistant group. The exposed subjects in noise group with normal EHF and abnormal EHF showed no difference in sound detection sensitivity compared with the control, but they showed significantly deteriorated signal processing ability in various behavior tests.

Conclusion:

12 kHz may be the most sensitive frequency to noise rather than 4KHz. Individual susceptibility to NIHL is different, female is more resistant. More sensitive tests could detect hidden hearing loss, which provide evidences to emphasize the contribution of auditory brain to the processing disorders.



Publication History

Publication Date:
23 April 2019 (online)

© 2019. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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