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 Personal Music Players and Hearing Loss: The HUNT Cohort Study

2021 ◽  
Vol 25 ◽  
pp. 233121652110158
Author(s):  
Bo Engdahl ◽  
Lisa Aarhus
Keyword(s):  
Hearing Loss ◽  
Noise Exposure ◽  
Large Population ◽  
Hearing Threshold ◽  
Reverse Causality ◽  
Cross Sectional ◽  
Follow Up Study ◽  
Ear Infections ◽  
Low Levels

It is unclear whether the current average use of personal music players (PMPs) including mobile phones has affected hearing in the general population. The association between the use of PMPs and hearing loss was assessed in a large population cross-sectional and follow-up study with the following distribution: cross-sectional (2018): n = 26,606, 56% women, mean age 54 years and 20-year follow-up (baseline 1998): n = 12,115, 57% women, mean age at baseline 43 years. Hearing threshold was determined as pure-tone average over the frequencies 3, 4, and 6 kHz. We used linear regression to assess relationships between hearing threshold and PMP use (yes), duration (1–2/2–6/>6 h per week), or sound volume (low/medium/high), with nonuse as reference. The PMP use increased from 8% in 1998 to 30% in 2018. Compared with nonusers, neither use nor duration was related to hearing threshold. As to sound volume, listening at low levels was associated with better thresholds (−2.5 dB [−4.1 to −0.8]), while listening at high levels was associated with worse thresholds (1.4 dB [0.1 to 2.8]). We adjusted for age, sex, baseline hearing threshold, education, noise exposure, ear infections, head injury, and daily smoking. The association with sound volume was nearly twice as strong when adjusting for hearing threshold at baseline. Accordingly, the possibility of reverse causality was reduced although not eliminated by the follow-up design. This large population study showed no association between normal PMP use and 20-year progression in hearing; however users listening to high levels increased their hearing threshold.

scholarly journals Effect of Phlorofucofuroeckol A and Dieckol Extracted from Ecklonia cava on Noise-induced Hearing Loss in a Mouse Model

Marine Drugs ◽  
2021 ◽  
Vol 19 (8) ◽  
pp. 443
Author(s):  
Hyunjun Woo ◽  
Min-Kyung Kim ◽  
Sohyeon Park ◽  
Seung-Hee Han ◽  
Hyeon-Cheol Shin ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Hair Cell ◽  
Noise Exposure ◽  
Radical Scavenging ◽  
Threshold Shift ◽  
Ecklonia Cava ◽  
Control Group ◽  
Noise Induced Hearing Loss ◽  
Antioxidant Agents ◽  
Brainstem Response

One of the well-known causes of hearing loss is noise. Approximately 31.1% of Americans between the ages of 20 and 69 years (61.1 million people) have high-frequency hearing loss associated with noise exposure. In addition, recurrent noise exposure can accelerate age-related hearing loss. Phlorofucofuroeckol A (PFF-A) and dieckol, polyphenols extracted from the brown alga Ecklonia cava, are potent antioxidant agents. In this study, we investigated the effect of PFF-A and dieckol on the consequences of noise exposure in mice. In 1,1-diphenyl-2-picrylhydrazyl assay, dieckol and PFF-A both showed significant radical-scavenging activity. The mice were exposed to 115 dB SPL of noise one single time for 2 h. Auditory brainstem response(ABR) threshold shifts 4 h after 4 kHz noise exposure in mice that received dieckol were significantly lower than those in the saline with noise group. The high-PFF-A group showed a lower threshold shift at click and 16 kHz 1 day after noise exposure than the control group. The high-PFF-A group also showed higher hair cell survival than in the control at 3 days after exposure in the apical turn. These results suggest that noise-induced hair cell damage in cochlear and the ABR threshold shift can be alleviated by dieckol and PFF-A in the mouse. Derivatives of these compounds may be applied to individuals who are inevitably exposed to noise, contributing to the prevention of noise-induced hearing loss with a low probability of adverse effects.

Noise

2020 ◽  
pp. 1671-1673
Author(s):  
David Koh ◽  
Tar-Ching Aw
Keyword(s):  
Cardiovascular Disease ◽  
Hearing Loss ◽  
Sleep Disturbance ◽  
Cognitive Performance ◽  
Noise Exposure ◽  
Threshold Shift ◽  
Temporary Threshold Shift ◽  
Noise Induced Hearing Loss ◽  
Occupational Setting ◽  
Human Ear

Noise can affect hearing in the occupational setting but can have other effects where exposures are non-occupational. For clinical purposes, noise is measured in decibels weighted according to the sensitivity of the human ear (dB(A)). Regardless of source, the effects of overexposure to noise are similar. Initially there is a temporary threshold shift, where reversibility of hearing loss is possible with removal away from further noise. Noise-induced hearing loss occurs following prolonged or intense exposure, with poor prospects for improvement of hearing. The classical audiogram for noise-induced hearing loss shows a 4 kHz dip. Non-auditory effects of prolonged noise exposure include annoyance, sleep disturbance, hypertension, and cardiovascular disease, stress, and impaired cognitive performance. Prevention of noise-induced hearing loss is by reducing exposure to noise at source minimizing exposure time, using hearing protection, and participating in surveillance.

Hearing loss associated with weapons noise exposure: when to investigate an asymmetrical loss

1995 ◽  
Vol 109 (4) ◽  
pp. 291-295 ◽  
Author(s):  
H. J. Cox ◽  
G. R. Ford
Keyword(s):  
Hearing Loss ◽  
Noise Exposure ◽  
Hearing Threshold ◽  
Routine Testing ◽  
Threshold Levels ◽  
Average Loss ◽  
The Right ◽  
Air Conduction ◽  
Selection Of

AbstractThe air conduction thresholds in the right and left ears, and the interaural asymmetry of thresholds at 0.5, 1, 2, 3, 4 and 6 kHz were measured in a group of 225 soldiers exposed to a variety of weapon noise who were referred for assessment because of a deterioration in hearing on routine testing. At 0.5 and I kHz the threshold levels rarely exceeded 25 dB and the interaural asymmetry was 10 dB or less in 90 per cent of cases. The degree of hearing loss and interaural asymmetry increased as the frequency increased, with the average loss being significantly greater in the left ear at 2, 3, 4 and 6 kHz.Recommendations are made for the selection of cases of asymmetrical hearing loss exposed to weapon noise which require further investigation to exclude a retrocochlear cause or to define spurious hearing threshold levels.

scholarly journals Prevalence of Hearing Loss in Military Aviators: The Audiometry and Risk Factors Analysis

2014 ◽  
Vol 9 (1) ◽  
pp. 19-24
Author(s):  
MR Alam ◽  
MA Wahab ◽  
MM Rahman ◽  
AKM Asaduzzaman ◽  
MAS Al-Azad ◽  
...  
Keyword(s):  
Risk Factors ◽  
Hearing Loss ◽  
Noise Exposure ◽  
Health Hazard ◽  
Hearing Threshold ◽  
Armed Forces ◽  
Cross Sectional Study ◽  
Noise Induced Hearing Loss ◽  
Cross Sectional ◽  
Medical Checkup

Introduction: Noise Induced Hearing Loss (NIHL) is an occupational health hazard linked with noise exposure of more than 85 dB. Aircraft noise and other occupational noise exposure cause military aviators more susceptible to NIHL than commercial jet pilots. Aim: To find out the prevalence of noise induced hearing loss among different military aircrew population with special emphasis on identifying the associated risk factors. Materials and Methods: This cross sectional study was conducted on Kuwait Air force pilots those who came for annual medical checkup from July 2010 to July 2012. Audiometry of all subjects was done by ENT specialist and necessary data were collected by structured questionnaires. All data were analyzed by SPSS (Statistical Package for the Social Sciences) version 17.0 Results: Out of 221 aircrew 32 (14.48%) developed NIHL. Hearing loss was mild to moderate and predominately at high frequencies. Most affected group was helicopter pilots. Pilots of more than 40 years of age and those who had more than 1000 flying hours had mean hearing threshold more than other groups. The right ear was affected in majority of cases than left ear. Conclusion: Noise exposure to aircrew is inevitable so hearing loss prevention strategies might play a pivotal role to save aircrew hearing. Active surveillance of hearing protection practices might have beneficiary effect. Steps can be taken for early detection of NIHL and hearing conservation program. DOI: http://dx.doi.org/10.3329/jafmc.v9i1.18721 Journal of Armed Forces Medical College Bangladesh Vol.9(1) 2013: 19-24

scholarly journals Noise Exposure and Hearing Threshold Profile among Zumba Fitness Regulars in Kuantan, Pahang, Malaysia

2020 ◽  
Vol 19 (2) ◽  
Author(s):  
Razali A ◽  
Othman MS ◽  
Rahman MS ◽  
Misaridin NFI
Keyword(s):  
Hearing Loss ◽  
Noise Exposure ◽  
Hearing Threshold ◽  
Sound Level ◽  
Hearing Level ◽  
Noise Induced Hearing Loss ◽  
Loud Noise ◽  
Abnormal Pattern ◽  
Level Meter ◽  
Hearing System

INTRODUCTION: Recreational noise exposure has become a major threat to the hearing system, and this includes exposure to loud noise during group exercises such as Zumba Fitness, where loud music plays an important role. This study aimed to assess the noise exposure and hearing threshold profile among Zumba Fitness regulars in Kuantan, Malaysia. MATERIALS AND METHODS: Noise exposure and hearing profile threshold were measured during Zumba Fitness sessions at a fitness studio in Kuantan, Malaysia from 24th June 2014 to 12th August 2014. Noise exposure was measured using a noise dosimeter for one hour of Zumba Fitness session with a total of nine sessions run by three different instructors while sound level pressure was taken using a sound level meter during ambient, peak session and during cooling down. Thirty participants answered questionnaires and underwent pure tone diagnostic audiometry test at a local clinic for hearing threshold documentation. RESULTS: Some areas of the hall posed higher risks of causing noise-induced hearing loss especially near the amplifiers. There were periods when the hearing level exceeded 115 dBA. Early abnormal pattern could be observed in the hearing profiles of some of the participants to suggest preliminary hearing problems. CONCLUSION: Zumba Fitness regulars have a risk of developing noise-induced hearing loss and preventive steps should be properly addressed as NIHL is permanent and irreversible.

Noise-Induced Hearing Loss in Professional Orchestral Musicians

2013 ◽  
Vol 38 (2) ◽  
pp. 223-234 ◽  
Author(s):  
Małgorzata Pawlaczyk-Łuszczyńska ◽  
Małgorzata Zamojska ◽  
Adam Dudarewicz ◽  
Kamil Zaborowski
Keyword(s):  
Hearing Loss ◽  
High Frequency ◽  
Noise Exposure ◽  
Hearing Threshold ◽  
Noise Induced Hearing Loss ◽  
Occupational Risk Factors ◽  
Threshold Levels ◽  
Exposed Population ◽  
Orchestral Musicians ◽  
The Impact

Abstract The overall purpose of this study was to assess hearing status in professional orchestral musicians. Standard pure-tone audiometry (PTA) and transient-evoked otoacoustic emissions (TEOAEs) were per- formed in 126 orchestral musicians. Occupational and non-occupational risk factors for noise-induced hearing loss (NIHL) were identified in questionnaire inquiry. Data on sound pressure levels produced by various groups of instruments were also collected and analyzed. Measured hearing threshold levels (HTLs) were compared with the theoretical predictions calculated according to ISO 1999 (1990). Musicians were exposed to excessive sound at weekly noise exposure levels of for 81-100 dB (mean: 86.6±4.0 dB) for 5-48 years (mean: 24.0±10.7 years). Most of them (95%) had hearing corresponds to grade 0 of hearing impairment (mean hearing threshold level at 500, 1000, 2000 and 4000 Hz lower than 25 dB). However, high frequency notched audiograms typical for noise-induced hearing loss were found in 35% of cases. Simultaneously, about 35% of audiograms showed typical for NIHL high frequency notches (mainly occurring at 6000 Hz). When analyzing the impact of age, gender and noise exposure on hearing test results both PTA and TEOAE consistently showed better hearing in females vs. males, younger vs. older musicians. But higher exposure to orchestral noise was not associated with poorer hearing tests results. The musician’s audiometric hearing threshold levels were poorer than equivalent non-noise-exposed population and better (at 3000 and 4000 Hz) than expected for noise-exposed population according to ISO 1999 (1990). Thus, music impairs hearing of orchestral musicians, but less than expected from noise exposure.

scholarly journals Prevalance of Noise Induced Hearing Loss among Traffic Police Personnel of Kathmandu Metropolitan City

2012 ◽  
Vol 9 (4) ◽  
pp. 274-278 ◽  
Author(s):  
I Shrestha ◽  
B L Shrestha ◽  
M Pokharel ◽  
R C M Amatya ◽  
D R Karki
Keyword(s):  
Hearing Loss ◽  
Noise Exposure ◽  
Positive Impact ◽  
Hearing Threshold ◽  
Pure Tone Audiometry ◽  
University Hospital ◽  
P Value ◽  
Noise Induced Hearing Loss ◽  
Traffic Police ◽  
Police Personnel

Background Noise induced hearing loss (NIHL) is a major preventable occupational health hazard. Objective To measure permanent threshold shift in traffic police personnel due to noise exposure and to examine whether it was associated with duration of noise exposure, years of work and risk factors. Methods Cross sectional, descriptive study conducted at Dhulikhel hospital, Kathmandu University Hospital in 110 responding traffic police personnel. Detailed history and clinical examination of ear, impedence audiometry and pure tone audiometry was performed. Results Mean age group was 29.82 years; 82(74.5%) were males and 28 (25.5%) were females. Mean duration of service is 11.86 years. Twenty six (23.6%) had tinnitus and 39(35.5%) had blocked sensation in ear. Sixty five (59.1%) worked between 10-19 years. Alcohol and smoking shows positive impact on NIHL (p value =0.00). Odds ratio with 95% confidence interval were 4.481 (1.925-10.432) and 6.578 (2.306-18.764) respectively. Among 73(66.4%) noise induced hearing loss positive cases, bilateral involvement was seen in 45 (40.9%) and unilateral in 28(25.4 %) cases. Among unilateral cases most were left sided. Hearing threshold at 4 kHz increased according to age and duration of service. Conclusion Traffic police personnel are in constant risk of noise induced hearing loss. Screening for hearing loss is recommended for people exposed to noise.DOI: http://dx.doi.org/10.3126/kumj.v9i4.6343 Kathmandu Univ Med J 2011;9(4):274-8

Vestibular-evoked myogenic potentials in chronic noise-induced hearing loss

2007 ◽  
Vol 137 (4) ◽  
pp. 607-611 ◽  
Author(s):  
Yen-Pin Wang ◽  
Yi-Ho Young
Keyword(s):  
Hearing Loss ◽  
Prospective Study ◽  
Noise Exposure ◽  
Hearing Threshold ◽  
Vestibular Evoked Myogenic Potentials ◽  
Noise Induced Hearing Loss ◽  
Vestibular Evoked Myogenic Potential ◽  
Myogenic Potential ◽  
Abnormal Rate ◽  
Sacculocollic Reflex

Objective To investigate the effect of chronic noise exposure on vestibular-evoked myogenic potentials. Study Design Prospective study. Subjects and Methods Twenty patients with chronic noise-induced hearing loss, presenting as bilateral notched audiogram at 4 kHz, underwent audiometry, caloric, and vestibular-evoked myogenic potential tests. Results Caloric and vestibular-evoked myogenic potential tests revealed abnormal responses in nine (45%) and 10 (50%) patients, respectively. However, when both results were considered together, the abnormal rate reached 70% (14 of 20). The hearing threshold of 4 kHz significantly associated with vestibular-evoked myogenic potential results (ie, vestibular-evoked myogenic potential was abnormal in patients with greater degrees of hearing loss), but not with caloric responses. Conclusion Patients with bilateral 4-kHz notched audiogram and hearing threshold of 4 kHz >40 dB may show abnormal (absent or delayed) vestibular-evoked myogenic potentials, indicating that the vestibular part, especially the sacculocollic reflex pathway, has also been damaged.

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