Study of exposure-time dependence of formation of excessive risk of hearing loss

2020 ◽  
pp. 728-729
Author(s):  
L. V. Prokopenko ◽  
N. N. Courierov ◽  
A. V. Lagutina
Keyword(s):  
Hearing Loss ◽  
Time Dependence ◽  
Exposure Time ◽  
Sound Pressure ◽  
Noise Exposure ◽  
Excess Risk ◽  
Length Of Service ◽  
Wide Range ◽  
Excessive Risk

The study presents the results of studying the formation of excess risk under the action of noise during the length of service, depending on the level of noise exposure. Excess risk has linearly depending on the magnitude of the weighted sound pressure over a wide range of sound pressures.

Calculatuon and assessment noise induced hearing loss excess risk in group of population

2019 ◽  
pp. 212-218
Author(s):  
L. V. Prokopenko ◽  
N. N. Courierov ◽  
A. V. Lagutina ◽  
E. S. Pochtariova
Keyword(s):  
Hearing Loss ◽  
Quantitative Methods ◽  
Noise Exposure ◽  
Excess Risk ◽  
Length Of Service ◽  
The Third ◽  
Hearing Thresholds ◽  
Risk Of Exposure ◽  
Excessive Risk

Introduction. Prevention of occupation hearing loss should be based on mathematical models and computational methods to predict changes in hearing thresholds (HT) with age and under the action of noise on the hearing organ. There is an urgent need for quantitative methods to determine the health risk of exposure to noise above 80 dBA.The aim of the study was to determine the group excessive risk of hearing loss (ERHL) under the action of noise using the model of the third edition of ISO 1999.Materials and methods. Developed technology for the determination of the HT model, the third edition of ISO 1999, depending on the gender, age, length of service and experienced noise exposure on the basis of the related sett lement tables MSExcell for population percentiles 1 to 99% in 1% step. Results. With the use of the developed technology, the initial data were determined and the main indicators of the group risk of hearing loss at the levels of criteria for the diagnosis of sensorineural hearing loss (SNT) were calculated. Th eir dependences on age, length of service and noise level are calculated.Conclusions: Th e developed technology allows us to calculate the probable hearing thresholds of the quantile of the population exposed to and unaff ected by noise and the magnitude of the group excess risk.

A Review of Gunshot Noise as Factor in Hearing Disorders

2019 ◽  
Vol 105 (6) ◽  
pp. 904-911 ◽  
Author(s):  
Ewa Skrodzka ◽  
Andrzej Wicher ◽  
Roman Gołe¸biewski
Keyword(s):  
Hearing Loss ◽  
Hair Cells ◽  
Impulse Noise ◽  
Noise Exposure ◽  
Single Shot ◽  
Negative Consequences ◽  
Mean Values ◽  
Sport Training ◽  
Wide Range ◽  
Auditory Systems

The impulse noise produced by personal weapons (guns, rifles, shotguns) during military activity, and while people engage in sport, training and hunting, is a threat to the auditory systems of soldiers, civilians, policemen, hunters, forest officers, sportspeople and bystanders not actively engaged in professional or recreational firing. An overview of noise levels generated by different types of weapon is provided, and potential short-term and long-term consequences for the human auditory system are described. The mean values of LC, peak sound pressure level during the shot, at the shooter's ears, for various types of weapons are approximately 160 dB SPL. These are levels that can cause permanent, irreversible negative effects on hearing (hearing loss, tinnitus, etc.) even as a result of a single shot being fired. One of the largest groups of weapon users in Poland (about 120 thousand) are hunters and field masters. They are not obligated by any regulations to protect their auditory systems from impulse noise. This means that this group of firearm users is at particularly high risk of hearing damage. On the basis of the literature review, it is shown that hearing exposure to high-level impulse noise such as a gunshot can result in such consequences as damage to the middle ear and destruction of the outer/inner hair cells in the cochlea. Especially difficult to diagnose is 'hidden hearing loss', i.e. damage to the synaptic connections between the hair cells of the inner ear and the auditory nerve fibres, which is not reflected in the results of basic audiometric testing and can cause hearing problems many years after impulse noise exposure. The wide range of negative consequences of gunfire noise clearly indicates the need for the hearing of the shooters to be protected.

Temporary Threshold Shift from a Toy Cap Gun

1974 ◽  
Vol 39 (2) ◽  
pp. 163-168 ◽  
Author(s):  
Lynne Marshall ◽  
John F. Brandt
Keyword(s):  
Hearing Loss ◽  
Sound Pressure Level ◽  
Sound Pressure ◽  
Noise Exposure ◽  
Pressure Level ◽  
Threshold Shift ◽  
Temporary Threshold Shift ◽  
Fixed Frequency ◽  
Before And After ◽  
The Subject

Temporary threshold shift resulting from exposure to one and five toy cap gun pistol shots was investigated using 11 normal-hearing adult subjects and one subject with a noise-induced hearing loss. The subjects fired the cap gun at arm’s length, and absolute thresholds at 4000 Hz were obtained before and after noise exposure by a fixed-frequency Bekesy technique. After exposure to one gunshot, five subjects showed a small TTS, five demonstrated no TTS, and two (including the subject with the hearing loss) exhibited negative TTS. No TTS occurred in any of the subjects after exposure to five shots. It was postulated that the small amount of TTS was due to the unexpectedly low sound pressure level produced by the cap gun and to the contraction of the middle ear muscles in some subjects prior to firing.

scholarly journals Association of Hearing Loss with Noise Exposure Time in Farm Machinery Operators.

1998 ◽  
Vol 47 (4) ◽  
pp. 583-588
Author(s):  
Hiroyuki TAKEZAWA ◽  
Masanori KONISHI ◽  
Ryoukichi IMAI ◽  
Masako WATANABE
Keyword(s):  
Hearing Loss ◽  
Exposure Time ◽  
Noise Exposure ◽  
Farm Machinery

Potentiation of Kanamycin Ototoxicity by a History of Noise Exposure

1978 ◽  
Vol 86 (1) ◽  
pp. ORL-125-ORL-128 ◽  
Author(s):  
Allen F. Ryan ◽  
Robert C. Bone
Keyword(s):  
Hearing Loss ◽  
Sound Pressure Level ◽  
Sound Pressure ◽  
Noise Exposure ◽  
Pressure Level ◽  
Threshold Shift ◽  
Noise Band ◽  
Pathologic Condition ◽  
History Of

Chinchillas were exposed to a noise band (1,414 to 5,656 Hz, 100-dB sound pressure level [SPL] for one hour) and treated with kanamycin (150 mg/kg a day until hearing loss was noted at 6.0 kHz) either separately, simultaneously, or sequentially. Simultaneous noise and kanamycin resulted in interactive potentiation of threshold shift and cochlear pathologic condition. Kanamycin treatment two months after noise exposure produced similar potentiation. No interaction was seen when noise exposure occurred one month after kanamycin treatment.

scholarly journals The prediction and risk point score (RPS) of noise induced hearing loss (NIHL)

2020 ◽  
Author(s):  
Ruican Sun ◽  
Weiwei Shang ◽  
Yingqiong Cao ◽  
Yajia Lan
Keyword(s):  
Hearing Loss ◽  
Prediction Model ◽  
Construction Industry ◽  
Exposure Time ◽  
Manufacturing Industry ◽  
Noise Exposure ◽  
Private Enterprise ◽  
Mining Industry ◽  
Noise Induced Hearing Loss ◽  
Point Score

Abstract Background Noise induced hearing loss (NIHL) is a significant occupational health concern in many countries. Based on the realistic demands, we aimed to build the prediction risk model of noise induced hearing loss (NIHL) and developed the related risk point score (RPS). The results of this study expect to provide technology support for interventions and management, in order to enhance the application-orientated research on NIHL. Methods A total of 40433 participants of noise exposed workers were enrolled. The datasets from The National Key Occupational Diseases Survey (NKODS) from 2014 to 2017 in Sichuan province of China. The socio-demographic and occupational characteristics used the standardized questionnaires, and the level of NIHL were collected by audiometric testing, which was defined as binaural high-frequency threshold average (BHFTA) over 40dB. The prediction model expressed by linear format of logistic regression and based on model calculated the risk point score (RPS) of NIHL. Results Of the 40433 participants in the study, there are 9.97%(n=4029) of workers have NIHL (BHFBA >40). Age (OR=1.08, 95%CI: 1.071-1.083), sex (OR=3.34, 95%CI:2.997-3.715), noise exposure time (OR=1.01, 95%CI: 1.008-1.017), manufacturing industry(OR=1.35, 95%CI:1.207-1.500), construction industry (OR=2.59, 95%CI: 1.941-3.458), mining industry (OR=2.42, 95%CI: 2.132-2.740), foreign enterprise(OR=1.14, 95%CI: 0.962-1.353), private enterprise(OR=1.48, 95%CI: 1.361-1.603) are predictors of NIHL( P <0.05). The risk prediction model has a better effectiveness of NIHL (AUC= 0.7150). According to the NIHL- RPS calculated the individual score was 75 that the risk probability of NIHL was 37.97%. Conclusion The study found that the prevalence of NIHL at a moderate level in Sichuan province. Sex, age, noise exposure time, manufacturing industry, construction industry, mining industry, foreign enterprise, private enterprise are predictors of NIHL, and to develop the NIHL-RPS is necessary for application-orientated research on NIHL.

scholarly journals The Effect of Exposure to Noise during Military Service on the Subsequent Progression of Hearing Loss

2021 ◽  
Vol 18 (5) ◽  
pp. 2436
Author(s):  
Brian C. J. Moore
Keyword(s):  
Hearing Loss ◽  
Longitudinal Studies ◽  
Military Service ◽  
Noise Exposure ◽  
Hearing Threshold ◽  
Wide Frequency Range ◽  
Frequency Range ◽  
Threshold Levels ◽  
Wide Range ◽  
High Level

This paper reviews and re-analyses data from published studies on the effects of noise exposure on the progression of hearing loss once noise exposure has ceased, focusing particularly on noise exposure during military service. The data are consistent with the idea that such exposure accelerates the progression of hearing loss at frequencies where the hearing loss is absent or mild at the end of military service (hearing threshold levels (HTLs) up to approximately 50 dB HL), but has no effect on or slows the progression of hearing loss at frequencies where the hearing loss exceeds approximately 50 dB. Acceleration appears to occur over a wide frequency range, including 1 kHz. However, each of the studies reviewed has limitations. There is a need for further longitudinal studies of changes in HTLs over a wide range of frequencies and including individuals with a range of HTLs and ages at the end of military service. Longitudinal studies are also needed to establish whether the progression of hearing loss following the end of exposure to high-level sounds depends on the type of noise exposure (steady broadband factory noises versus impulsive sounds).

Audiological and noise exposure findings among members of a brazilian folklore music group

Work ◽  
2021 ◽  
pp. 1-7
Author(s):  
Carina Moreno Dias Carneiro Muniz ◽  
Sergio Fernando Saraiva da Silva ◽  
Rachel Costa Façanha ◽  
Daniela Bassi-Dibai ◽  
Fabricio Brito Silva ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Sound Pressure Level ◽  
High Frequency ◽  
Sound Pressure ◽  
Noise Exposure ◽  
Descriptive Study ◽  
Pressure Level ◽  
Noise Induced Hearing Loss ◽  
Loud Noise ◽  
Two Stages

BACKGROUND: Musicians and dancers can be considered an at-risk population for developing noise-induced hearing loss. OBJECTIVES: To determine the audiological profile of members of a folklore-related music group and quantify noise exposure at their rehearsal venue. METHODS: This was a quantitative and descriptive study. The musicians and dancers were evaluated in two stages: an interview about their working life, followed by high frequency tonal audiometry. The sound pressure level in the group’s rehearsal venue was measured using a BEK 2270 Noise Analyzer. RESULTS: A total of 7.2% of the subjects had noise-induced hearing loss (NIHL) and 39% of the audiometric tests were notch type. During the interview 31.7% of the subjects mentioned discomfort from loud noise, although none of them used ear protection. The environmental assessment showed inadequate humidity and oscillating temperature. Twenty sound pressure level measurements were performed for Leq (equivalent sound pressure levels) and the results ranged from 88 dB (A) to 99 dB (A) with a mean of 97.05. CONCLUSIONS: Exposure to high levels of sound pressure has led to NIHL in some members of the group. Some of those with normal hearing also presented a notch configuration characteristic of NIHL. Tinnitus, indicating that a change in hearing has occurred, was the most frequent auditory symptom.

scholarly journals University music teachers' exposure to noise and hearing loss

2017 ◽  
Vol 1 (1) ◽  
pp. 49-58
Author(s):  
A. Delgado ◽  
F. Carvalho ◽  
R. B. Melo
Keyword(s):  
Hearing Loss ◽  
Extracurricular Activities ◽  
Sound Pressure ◽  
Noise Exposure ◽  
Music Teachers ◽  
Brass Instruments ◽  
School Of Music ◽  
Exposure Levels ◽  
Hearing Damage ◽  
High Sound

Musical instruments and singers' voices can reach high sound pressure values representing a risk to hearing health, which is of particular relevance for music teachers. Therefore, the potential risk of hearing damage among music teachers in a university school of music was assessed. Twenty teachers completed all phases of the study. Sound pressure levels were measured with a sound meter and daily noise exposure levels were computed and compared with legal reference values in force. Three types of hearing exams were administered to all teachers by health technicians. Most teachers (75%) were subjected to daily noise exposure levels below 80 dB(A). Teaching to play brass instruments appears to be the most risky activity. Only three subjects were diagnosed with noise-induced hearing loss, which cannot be exclusively ascribed to occupational activities because they are involved in extracurricular activities. Increased sample size and the use of noise dosimetry would have improved the study conclusions.

scholarly journals Noise-Induced Hearing Loss and Hypertension: A Preliminary Analysis of Baseline Data of Occupational Noise-Exposed Workers

2021 ◽  
Author(s):  
Long Miao ◽  
Lihong Yin ◽  
Yuepu Pu
Keyword(s):  
Blood Pressure ◽  
Hearing Loss ◽  
Exposure Time ◽  
Noise Exposure ◽  
Normal Hearing ◽  
Baseline Data ◽  
Noise Induced Hearing Loss ◽  
Occupational Noise ◽  
Exposed Workers ◽  
The Mean

Abstract The present study aimed to determine the current levels of systolic blood pressure (SBP), diastolic blood pressure (DBP) and binaural high frequency (3, 4, and 6 kHz) threshold on average (BHFTA), to assess the prevalence of noise-induced hearing loss (NIHL) and hypertension and determine the factors influencing the risk of both, and to evaluate the association between NIHL and hypertension among occupational noise-exposed workers. Questionnaire and occupational health checkup were performed to collect the personal information and physical examination data. Finally, baseline data from 42,588 occupational noise-exposed workers were analyzed. The mean levels of SBP, DBP, and BHFTA were 126.85 ± 15.94 mm Hg, 79.94 ± 11.61 mm Hg and 23.09 ± 11.32 dB, respectively. Of the 42,588 subjects, the prevalence of NIHL and hypertension were 24.38% (n = 10,383) and 25.40% (n = 10,816). The results suggested that higher risk of NIHL and hypertension were more likely to be the groups of male gender, aged > 35 years, exposure time to noise > 5 years, and smoking. The SBP, DBP and BHFTA levels increased with age and noise exposure time (Ptrend < 0.001). Besides, similar trends were also observed in the prevalence of NIHL and hypertension. Furthermore, there was a significant association of NIHL with hypertension. We found that 32.25% (n = 3,348) workers with NIHL had hypertension. The mean levels of SBP and DBP in NIHL workers were significantly higher than those with normal hearing (P < 0.001). In addition, NIHL workers had a significantly higher risk of developing hypertension than normal hearing workers (adjusted OR = 1.08, 95%CI = 1.03–1.14). Our current findings suggest that the prevalence of NIHL and hypertension are high in our study workers and occupational noise exposure is an important factor. Therefore, it is urgent to reduce noise exposure in the workplaces and to strengthen industrial noise monitoring.

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