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Speech-in-Noise Test results of compensation claimants for noise induced hearing loss in Korean male workers: Words-in-Noise Test (WIN) and quick-Hearing-in-Noise Test (HINT)
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Ji Soo Kim, Joong Keun Kwon, Nam Jeong Kim, Ji Ho Lee
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Ann Occup Environ Med 2021;33:e11. Published online April 20, 2021
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DOI: https://doi.org/10.35371/aoem.2021.33.e11
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Abstract
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- Background
Pure-tone audiometry is used as a gold standard for hearing measurement. However, since communication in the work environment occurs in noise, it might be difficult to evaluate the actual communication ability accurately based on pure-tone audiometry only. Therefore, the purpose of this study is to evaluate speech intelligibility in noisy environments by using Speech-in-Noise Tests and to check its relationship with pure-tone audiometry. MethodsFrom January 2017 to September 2018, for 362 workers who visited a university hospital for the purpose of compensating for noise-induced hearing loss, several tests were conducted: pure-tone audiometry, speech reception threshold, speech discrimination score, and Speech-in-Noise Tests (Words-in-Noise Test [WIN] and quick-Hearing-in-Noise Test [quick-HINT]). The subjects were classified into serviceable hearing group and non-serviceable hearing group based on 40 dB hearing level (HL) pure-tone average. In both groups, we conducted age-adjusted partial correlation analysis in order to find out the relationship between pure-tone threshold, speech reception threshold, speech discrimination score and WIN and quick-HINT respectively. ResultsIn non-serviceable hearing group, all results of partial correlation analysis were statistically significant. However, in serviceable hearing group, there were many results which showed little or no significant relationship between pure-tone threshold and Speech-in-Noise Tests (WIN and quick-HINT). ConclusionsThe relationship between Speech-in-Noise Tests and the pure-tone thresholds were different by the hearing impairment levels; in mild to moderate hearing loss workers, there was little or no relationship; in severe cases, the relationship was significant. It is not enough to predict the speech intelligibility of hearing-impaired persons, especially in mild to moderate level, with pure-tone audiometry only. Therefore, it would be recommended to conduct Speech-in-Noise Test.
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- Cochlear Implantation after Stereotactic Radiosurgery for Vestibular Schwannoma: Initial Hearing Improvement and Longevity of Hearing Restoration
Kurtis Young, Maeher R. Grewal, Rodney C. Diaz, Arthur W. Wu, Mia E. Miller Otology & Neurotology.2023; 44(3): 201. 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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- 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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The Impact of Noise Expose on the Hearing Threshold Extended High Frequency
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Nam Jeong Kim, Joong Keun Kwon, Ji Ho Lee
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Korean Journal of Occupational and Environmental Medicine 2008;20(2):81-92. Published online June 30, 2008
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DOI: https://doi.org/10.35371/kjoem.2008.20.2.81
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Abstract
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- OBJECTIVES
To determine how extended high frequency is affected by noise exposure and other factors that maybe have adverse effects. METHODS Pure tone audiometry for usual frequencies (250-8000 Hz) and extended high frequencies (1000-16000 Hz) was conducted for 331 workers at a manufacturing company from 2004 to 2005. History of noise exposure, military service, tinnitus, alcohol drinking, smoking, ear diseases, and noisy hobbies were taken by interview. T-test, ANOVA, and multiple regression was conducted according to the frequency to evaluate the factors that could affect extended high frequency hearing. RESULTS The noise-exposed group had significantly poorer hearing than the noise-unexposed in the frequency range 2000-16000 Hz. The hearing deteriorated with increasing age through all the frequencies. High frequency hearing of 14000 Hz was significantly worse in the noise-exposed group in their 30s. Noise exposure during military service had a bad effect on hearing, especially for the noise-unexposed group. Tinnitus was associated with poorer hearing in both noise-exposed and noise-unexposed groups. Workers with noisy hobbies exhibited better hearing in the noise-unexposed group, contrary to our expectation. Extended high-frequency hearing was affected by aging, ear protection, and noisy hobbies. In extended high frequency, 14000 Hz was especially related with noise exposure history. CONCLUSIONS Extended high frequency, especially 14000 Hz, could be used as an indicator of noiseinduced hearing loss and should be considered as a screening test for workers in noisy environments.
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- Stress of Noise on Dental Technician
Ju Hee Lee Journal of Korean Acedemy of Dental Technology.2014; 36(2): 111. CrossRef
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