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The Characteristics of Tinnitus and Hearing Threshold: In Workers with Noise Induced Hearing Loss from a Hospital Setting
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Nam Jeong Kim, Hyoung Ouk Park, Chang Sun Sim, Choong Ryeol Lee, Young Joo Kwon, Ji Ho Lee
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Korean Journal of Occupational and Environmental Medicine 2012;24(4):431-440. Published online December 31, 2012
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DOI: https://doi.org/10.35371/kjoem.2012.24.4.431
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 Abstract
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- OBJECTIVES
This study was carried out to define the relationship between the characteristics of tinnitus and hearing threshold (puretone and speech) in workers with noise induced hearing loss (NIHL).
METHODS
A total of 189 cases(378 ears) from workers with compensation claims for NIHL during 2004-2009 were investigated. Various factors, including age, work carriers, body mass index (BMI), blood pressure, noise exposure level of worksite hearing threshold, speech discrimination score, pitch match, and loudness of tinnitus were analyzed.
RESULTS
The average hearing threshold of all subject was 44.2 dBHL, puretone audiometry thresholds in subjects with tinnitus were lower than the non-tinnitus group (except at 8000 Hz). Using speech audiometry, the tinnitus group showed a lower speech recognition threshold and speech discrimination score. The tinnitus group also had an average tinnitus frequency of 4195.2 Hz, loudness of 73.6 dB, and tinnitus sensation average of 6.0 dBSL. These frequencies of tinnitus were in the lowest puretone audiometry frequencies. Tinnitus loudness had a strong relationship with puretone and speech audiometry thresholds.
CONCLUSIONS
In cases beyond moderate hearing loss, the tinnitus group had a better puretone (except 8000 Hz) and speech hearing status, and most comfortable loudness (MCL) level. In addition, puretone and speech audiometry thresholds increase with tinnitus loudness.
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Citations
Citations to this article as recorded by  - The Relationship Between Tinnitus Frequency and Speech Discrimination in Patients With Hearing Loss
Joo Hyung Oh, Taehun Lim, Joon Bum Joo, Ju Eun Cho, Pona Park, Jong Yang Kim
Korean Journal of Otorhinolaryngology-Head and Neck Surgery.2023; 66(3): 156. CrossRef - Efficiency Improvement of the Hearing Test Procedure Using Linear Regression
Heonzoo Lee, Sejin Kim, Rayoung Park, Sungsu Lee, Hyong-Ho Cho, Yonggwan Won
Journal of Digital Contents Society.2022; 23(12): 2489. CrossRef
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Effects of Workplace Noise and Hearing Protective Devices on Worker's Speech Intelligibility
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Hyoung Ouk Park, Chang Sun Sim, Joong Keun Kwon, Kyoo Sang Kim, Young Joo Kwon, Nam Jeong Kim, Min Suk Seo, Ji Ho Lee
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Korean Journal of Occupational and Environmental Medicine 2010;22(2):154-165. Published online June 30, 2010
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DOI: https://doi.org/10.35371/kjoem.2010.22.2.154
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Abstract
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- OBJECTIVE: The objective of this study was to evaluate the degree of intelligible speech in workers wearing hearing protective devices and the differences in background noise type.
METHODS
A total 82 shipyard company employees and normal hearing volunteers were recruited as subjects from a company in Ulsan: subjects were classified to the hearing-impaired group or to the control group according to hearing status. They were tested pure tone and speech audiometry in varying test environments including signal-to-noise ratio and background noise type in a headphone and in a free field environment.
RESULTS
For both groups, the attenuation of hearing protective devices was greater at high frequencies. For the hearing-impaired group, speech discrimination scores differences between the unprotected and the protected ear were not significant between background noise type, when speech was presented at 65 dBA. However speech intelligibility in white noise background was lower than in the other background noise types when speech was presented at 75 dBA.
CONCLUSIONS
Workers' speech intelligibility increased with an increasing signal-to-noise ratio. Speech intelligibility was also dependent on background noise type. Workers and their colleagues were trained to pronounce words more loudly and more clearly when they wearing hearing protective devices or other communication methods that do not use sound signal should be considered.
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Citations
Citations to this article as recorded by - Effects of Hearing Protection Methods and Noise Directions on Bone-Conduction Sensitivity
Woojae Han
THE JOURNAL OF THE ACOUSTICAL SOCIETY OF KOREA.2013; 32(5): 423. CrossRef - An experimental study on the improving noise characteristic of hydraulic power unit
Gi Chun Lee, Yong Bum Lee
Journal of the Korean Society of Marine Engineering.2013; 37(6): 638. CrossRef
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