Hearing threshold shift measured by otoacoustic emissions after shooting noise exposure in soldiers using hearing protectors

2007 ◽  
Vol 136 (1) ◽  
pp. 78-81 ◽  
Author(s):  
Jurek Olszewski ◽  
Jarosław Miłoński ◽  
Sławomir Olszewski ◽  
Joanna Majak
Keyword(s):  
Otoacoustic Emissions ◽  
Noise Exposure ◽  
Hearing Threshold ◽  
Threshold Shift ◽  
Hearing Protectors

scholarly journals Audiometric notch and extended high-frequency hearing threshold shift in relation to total leisure noise exposure: An exploratory analysis

2017 ◽  
Vol 19 (91) ◽  
pp. 263 ◽  
Author(s):  
Veronika Weilnhammer ◽  
Wenjia Wei ◽  
Stefanie Heinze ◽  
DorisG Gerstner ◽  
SandraM Walser ◽  
...  
Keyword(s):  
High Frequency ◽  
Noise Exposure ◽  
Hearing Threshold ◽  
Exploratory Analysis ◽  
Threshold Shift

Temporary Threshold Shift and Otoacoustic Emissions after Industrial Noise Exposure

1995 ◽  
Vol 24 (2) ◽  
pp. 137-141 ◽  
Author(s):  
Kari J. Kvœrner ◽  
Bo Engdahl ◽  
Atle R. Arnesen ◽  
Iain W. S. Mair
Keyword(s):  
Otoacoustic Emissions ◽  
Noise Exposure ◽  
Threshold Shift ◽  
Temporary Threshold Shift ◽  
Industrial Noise

scholarly journals Effect of Workplace Noise on Hearing Ability in Tile and Ceramic Industry Workers in Iran: A 2-Year Follow-Up Study

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Mehrdad Mostaghaci ◽  
Seyyed Jalil Mirmohammadi ◽  
Amir Houshang Mehrparvar ◽  
Maryam Bahaloo ◽  
Abolfazl Mollasadeghi ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Noise Exposure ◽  
Hearing Threshold ◽  
Threshold Shift ◽  
Noise Induced Hearing Loss ◽  
Follow Up Study ◽  
Hearing Ability ◽  
The Right ◽  
Ceramic Workers

Introduction. Noise as a common physical hazard may lead to noise-induced hearing loss, an irreversible but preventable disorder. Annual audiometric evaluations help detect changes in hearing status before clinically significant hearing loss develops. This study was designed to track hearing threshold changes during 2-year follow-up among tile and ceramic workers.Methods. This follow-up study was conducted on 555 workers (totally 1110 ears). Subjects were divided into four groups according to the level of noise exposure. Hearing threshold in conventional audiometric frequencies was measured and standard threshold shift was calculated for each ear.Results. Hearing threshold was increased during 2 years of follow-up. Increased hearing threshold was most frequently observed at 4000, 6000, and 3000 Hz. Standard threshold shift was observed in 13 (2.34%), 49 (8.83%), 22 (3.96%), and 63 (11.35%) subjects in the first and second years of follow-up in the right and left ears, respectively.Conclusions. This study has documented a high incidence of noise-induced hearing loss in tile and ceramic workers that would put stress on the importance of using hearing protection devices.

scholarly journals Assessment of noise impact on coal mine workers including way to/from workplace

2021 ◽  
pp. 151-155
Author(s):  
A.N Nikulin ◽  
I.S Dolzhikov ◽  
L.V Stepanova ◽  
V.A Golod
Keyword(s):  
Coal Mine ◽  
Occupational Disease ◽  
Noise Level ◽  
Noise Exposure ◽  
Hearing Threshold ◽  
Sound Level ◽  
Threshold Shift ◽  
Disease Stage ◽  
Noise Impact ◽  
The Way

Purpose. Determination of the noise induced permanent threshold shift for a coal miners in five main working professions, taking into account the noise impact on the way to the workplace and back based on data obtained from personal sound level meters. Methodology. A strategy is selected for measuring the level of noise exposure at workplaces No. 3 per workday (GOST ISO 9612-2016) in a coal mine. Personal sound level meters were attached to the miners shoulders; they measured the noise level on the way to the workplace, during the work shift (8 hours) and on the way back. The processing of the measurement results was carried out on the basis of a quantitative assessment of the noise impact on workers according to the noise induced permanent threshold shift (NIPTS). The NIPTS values were calculated for a period from 3 to 30 years for 5 main professions, taking into account the noise impact when moving to the workplace and back. Findings. The values of the equivalent noise level at miners workplaces of are determined, which are 15 to 20 dBA above the maximum permissible equivalent level (80 dBA). Based on the results obtained, a constant shift in the hearing threshold was forecast for workers of five occupations with seniority of 3 to 30 years. A reduction in the hearing threshold of a sinker will amount to 25 dB in 30 years, which corresponds to the occupational disease Stage 3. Originality. Constant displacement of the hearing threshold for workers in coal mines, caused by the effect of an increased noise level during the journey to the place of work and back, was revealed. Practical value. It was found that in order to prevent the development of an occupational disease (sensorineural hearing loss) in underground miners, it is necessary to measure the noise level by using personal sound level meters for an 8-hour working day, taking into account the way time to the workplace and back. Noise exposure assessment should be based on a continuous decrease in the hearing threshold.

scholarly journals Social Noise Exposure in a Sample of Slovak University Students

2020 ◽  
Vol 17 (1) ◽  
pp. 324 ◽  
Author(s):  
Alexandra Filova ◽  
Jana Jurkovicova ◽  
Katarina Hirosova ◽  
Diana Vondrova ◽  
Barbora Filova ◽  
...  
Keyword(s):  
Young Adults ◽  
University Students ◽  
Noise Exposure ◽  
Road Traffic ◽  
Traffic Noise ◽  
Hearing Threshold ◽  
Threshold Shift ◽  
Road Traffic Noise ◽  
Significant Difference ◽  
Pilot Sample

Purpose: Social noise exposure is currently an emerging problem in adolescents and young adults. Various leisure time activities may be responsible for hearing impairment (temporary or permanent hearing threshold shift or hearing loss). The study aimed to quantify environmental noise from various sources—voluntary (social) noise (personal music players (PMPs), high-intensity noise exposure events), and road traffic noise and to detect hearing disorders in relation to individual listening to PMPs in the sample of young adults living and studying in Bratislava, the capital city of Slovakia. Methods: The study included 1003 university students (306 men and 697 women, average age 23.1 ± 2) living in Bratislava for 4 or more years; 347 lived in the student housing facility exposed to road traffic noise (LAeq = 67.6 dB) and 656 in the control one (LAeq = 53.4 dB). Respondents completed a validated ICBEN 5-grade scale “noise annoyance questionnaire”. In the exposed group a significant source of annoyance was road traffic noise (p < 0.001), noise from entertainment facilities (p < 0.001), industrial noise (p < 0.001), and noise from neighboring flats (p = 0.003). The exposure to PMPs was objectified by the conversion of the subjective evaluation of the volume setting and duration. With the cooperation of the Ear, Nose and Throat (ENT)specialist, we arranged audiometric examinations on the pilot sample of 41 volunteers. Results: From the total sample of respondents, 79.2% reported the use of a PMP in the course of the last week, and the average time was 285 min. There was a significant difference in PMP use between the road traffic noise-exposed (85.6%) and the control group (75.8%) (p = 0.01). Among PMP users 30.7% exceeded the lower action value (LAV) for industry (LAeq,8h = 80 dB). On a pilot sample of volunteers (n = 41), audiometry testing was performed indicating a hearing threshold shift at higher frequencies in 22% of subjects. Conclusions: The results of the study on a sample of young healthy individuals showed the importance of exposure to social noise as well as to road traffic noise and the need for prevention and intervention.

scholarly journals Determinants of the Audiometric Notch at 4000 and 6000 Hz in Young Adults

2020 ◽  
Vol 31 (06) ◽  
pp. 371-383
Author(s):  
Ishan Sunilkumar Bhatt
Keyword(s):  
Young Adults ◽  
Otoacoustic Emissions ◽  
Noise Exposure ◽  
Hearing Threshold ◽  
Calibration Error ◽  
Cochlear Function ◽  
Cross Sectional ◽  
Distortion Product ◽  
Hearing Thresholds ◽  
Children And Young Adults

Abstract Background Noise-induced hearing loss (NIHL) is often characterized by the presence of an audiometric notch at 3000-6000 Hz in a behavioral audiogram. The audiometric notch is widely used to investigate NIHL in children and young adults. However, the determinants of the audiometric notch in young adults largely remain unknown. Purpose The study aimed to investigate the determinants of the audiometric notch in young adults. Research Design A cross-sectional design was adopted for the study. Study Sample A sample of 124 adults (38 males and 86 females) aged 18-35 years with normal otoscopic and tympanometric findings was recruited. Data Collection and Analysis Hearing thresholds and real-ear sound pressure levels (RESPLs) were obtained with calibrated ER-3A (Etymotic Research, Elk Grove Village, IL) andTDH-50P receivers (Telephonics, Farmingdale, NY). Distortion-product otoacoustic emissions (DPOAEs) were used to evaluate the cochlear function. The external auditory canal (EAC) length was measured using the acoustical method. Noise exposure background (NEB) was estimated using the Noise Exposure Questionnaire. The notched audiograms were identified using: Phillips, Coles, and Niskar criteria. Results The prevalence of notched audiograms was substantially higher for TDH-50P supra-aural receivers than for ER-3A insert receivers. RESPLs at 6000 and 8000 Hz were the major predictors of notched audiograms for TDH-50P receivers. These predictors explained around 45% of the variance in the notched audiograms. The notched audiograms obtained with TDH-50P receivers showed no association with NEB. Individuals with notched audiograms measured using TDH-50P did not show convincing evidence of cochlear dysfunction as assessed by DPOAEs. Individuals with notched audiograms obtained with TDH-50P receivers revealed an average of shorter EAC and a poorer hearing threshold at 6000 Hz. Conclusions The calibration error in the RESPLs at 6000 and 8000 Hz that are likely to be influenced by the shorter EAC was the major determinant of the notched audiograms when the supra-aural transducers were used to measure hearing thresholds. Therefore, the supra-aural receivers should not be used to estimate the prevalence of NIHL in children and young adults when the less restrictive notch identification criteria are used to identify NIHL. Real-ear calibration techniques that are least influenced by the standing waves in the EAC should be preferred when investigating the prevalence of and risk factors for NIHL in young adults.

Damage Risk: An Evaluation of the Effects of Exposure to 85 versus 90 dBA of Noise

1976 ◽  
Vol 19 (2) ◽  
pp. 216-224 ◽  
Author(s):  
James T. Yates ◽  
Jerry D. Ramsey ◽  
Jay W. Holland
Keyword(s):  
White Noise ◽  
Statistical Difference ◽  
Noise Exposure ◽  
Threshold Shift ◽  
Temporary Threshold Shift ◽  
Noise Levels ◽  
Potential Damage ◽  
Full Day ◽  
Damage Risk

The purpose of this study was to compare the damage risk of 85 and 90 dBA of white noise for equivalent full-day exposures. The damage risk of the two noise levels was determined by comparing the temporary threshold shift (TTS) of 12 subjects exposed to either 85 or 90 dBA of white noise for equivalent half- and full-day exposures. TTS was determined by comparing the pre- and postexposure binaural audiograms of each subject at 1, 2, 3, 4, 6, and 8 kHz. It was concluded that the potential damage risk, that is, hazardous effect, of 90 dBA is greater than 85 dBA of noise for equivalent full-day exposures. The statistical difference between the overall effects of equivalent exposures to 85 dBA as compared to 90 dBA of noise could not be traced to any one frequency. The damage risk of a full-day exposure to 85 dBA is equivalent to that of a half-day exposure to 90 dBA of noise. Within the limits of this study, TTS t was as effective as TTS 2 for estimating the damage risk of noise exposure.

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