scholarly journals EFEK BISING MESIN ELEKTRONIKA TERHADAP GANGGUAN FUNGSI PENDENGARAN PADA PEKERJA DI KECAMATAN SARIO KOTA MANADO, SULAWESI UTARA

2013 ◽  
Vol 1 (1) ◽  
Author(s):  
Hardini Tjan ◽  
Fransiska Lintong ◽  
Wenny Supit
Keyword(s):  
Hearing Loss ◽  
Work Environment ◽  
Noise Exposure ◽  
Sensorineural Deafness ◽  
Bivariate Analysis ◽  
Fisher Exact Test ◽  
Exposure Level ◽  
Intensity Level ◽  
Noise Induced Hearing Loss ◽  
Cross Sectional

Abstract: Noise induced hearing loss is caused by noise loud in the long period and a noisy work environment. Noisy work environment is a major problem in occupational health in various countries. The relationship between excessive noise exposure and hearing loss has been recognised since ancient times. Early epidemiological studies of noise induced hearing loss explored the damage risk relationship between occupational noise exposure level and the degree of hearing loss. The purpose of this study is to determine effect of engine noise electronics to auditory disfunction. The research methodeology used is an analytical method with a cross sectional approach. Samples were of 20 person taken from workers at the playground timezone and amazone. Data were obtained through questionnaires and examination of hearing function with the audiometri. Data were analyzed by using the Statistical Product and Service Solutions program (SPSS) and using the Fisher Exact test. Conclusion: The results showed that : There is a 75% hearing loss in all worker. The results of bivariate analysis showed there is no significant association between the hearing loss with the intensity level of noise (p = 0,032). The most common hearing loss is sensorineural deafness which generally occours in both ear. From the result of this study it can be concluded that the workers who work in a place that has the high intensity noise have greater risk of suffening from hearing loss. Keywords: Timezone and Amazone Workers, Noisy, Hearing.     Abstrak: Gangguan pendengaran akibat bising ialah gangguan pendengaran yang disebabkan akibat terpajan oleh bising yang cukup keras dalam jangka waktu yang cukup lama dan biasanya disebabkan oleh bising di lingkungan kerja. Bising lingkungan kerja merupakan masalah utama pada kesehatan kerja di berbagai negara. Hubungan antara paparan bising yang berlebihan dan kehilangan pendengaran telah dikenal sejak zaman kuno. Awal studi epidemiologi, gangguan pendengaran yang disebabkan oleh bising mengeksplorasi adanya hubungan atau faktor resiko antara pekerjaan, paparan tingkat kebisingan dan derajat gangguan pendengaran. Tujuan penelitian ini untuk mengetahui efek bising mesin elektronika terhadap gangguan fungsi pendengaran. Metode penelitian yang digunakan yaitu metode analitik dengan menggunakan rancangan cross sectional study. Sampel berjumlah 20 orang yang diambil dari pekerja di tempat bermain timezone dan amazone. Data diperoleh melalui kuisioner dan pemeriksaan fungsi pendengaran dengan menggunakan Audiometri. Data dianalisis dengan menggunakan Statistical Program Product and Service Solution (SPSS) dan menggunakan uji Fisher Exact. Simpulan: Hasil penelitian menunjukkan bahwa : Terdapat gangguan pendengaran sebesar 75 % pada seluruh pekerja. Hasil analisis bivariat menunjukan ada hubungan yang bermakna antara gangguan pendengaran dengan tingkat intensitas bising (p =  0,032).  Gangguan pendengaran yang paling banyak diderita oleh pekerja adalah tuli sensorineural (persepsi) yang umumnya terjadi pada kedua telinga. Dari hasil penelitian ini dapat disimpulkan bahwa pekerja yang bekerja pada intensitas bising yang tinggi memiliki resiko lebih besar menderita gangguan pendengaran. Kata Kunci: Pekerja Timezone & Amazone, Bising, Pendengaran

scholarly journals Screening for Noise-Induced Hearing Loss among Palm Oil Mill Workers in Peninsular Malaysia: A Comparison across Noise Exposure Levels

Standards ◽  
2022 ◽  
Vol 2 (1) ◽  
pp. 32-42
Author(s):  
Sirri Ammar ◽  
Aziah Daud ◽  
Ahmad Filza Ismail ◽  
Ailin Razali
Keyword(s):  
Hearing Loss ◽  
Palm Oil ◽  
Noise Exposure ◽  
High Risk Group ◽  
Vulnerable Groups ◽  
Exposure Level ◽  
Noise Induced Hearing Loss ◽  
Cross Sectional ◽  
Exposure Levels ◽  
Palm Oil Mill

Background: Palm oil mill workers in Malaysia are exposed to hazardous levels of noise in the workplace, and thus are at risk of developing noise-induced hearing loss (NIHL). In 2019, Malaysia introduced a new noise regulation, which reduced the level of permissible noise exposure. Objectives: This study aims to determine the prevalence of NIHL among palm oil mill workers based on screening data and assess the effects of different noise exposure levels on NIHL. Methods: A cross-sectional study was conducted by analyzing data from noise risk assessment reports of selected mills and screening audiometric data from workers. NIHL was defined as bilateral high-frequency hearing loss. Results: The overall NIHL prevalence was 50.8%. Noise exposure level and age were significant predictors of NIHL among the workers. The risk of developing NIHL was high even for workers who were not categorized in the high-risk group. Conclusions: In view of the findings, a precautionary approach is needed when evaluating the risk of NIHL in the study population. Vulnerable groups of workers must be protected from occupational noise hazards through the implementation of effective hearing conservation programs in the workplace.

scholarly journals Audiometric profile of civilian pilots according to noise exposure

2014 ◽  
Vol 48 (5) ◽  
pp. 790-796 ◽  
Author(s):  
Taiana Pacheco Falcão ◽  
Ronir Raggio Luiz ◽  
Gabriel Eduardo Schütz ◽  
Márcia Gomide da Silva Mello ◽  
Volney de Magalhães Câmara
Keyword(s):  
Hearing Loss ◽  
Pure Tone ◽  
Noise Exposure ◽  
Acoustic Stimulus ◽  
Cross Sectional Study ◽  
Exposure Level ◽  
Noise Induced Hearing Loss ◽  
Length Of Service ◽  
Cross Sectional ◽  
Air Conduction

OBJECTIVE To evaluate the audiometric profile of civilian pilots according to the noise exposure level. METHODS This observational cross-sectional study evaluated 3,130 male civilian pilots aged between 17 and 59 years. These pilots were subjected to audiometric examinations for obtaining or revalidating the functional capacity certificate in 2011. The degree of hearing loss was classified as normal, suspected noise-induced hearing loss, and no suspected hearing loss with other associated complications. Pure-tone air-conduction audiometry was performed using supra-aural headphones and acoustic stimulus of the pure-tone type, containing tone thresholds of frequencies between 250 Hz and 6,000 Hz. The independent variables were professional categories, length of service, hours of flight, and right or left ear. The dependent variable was pilots with suspected noise-induced hearing loss. The noise exposure level was considered low/medium or high, and the latter involved periods > 5,000 flight hours and > 10 years of flight service. RESULTS A total of 29.3% pilots had suspected noise-induced hearing loss, which was bilateral in 12.8% and predominant in the left ear (23.7%). The number of pilots with suspected hearing loss increased as the noise exposure level increased. CONCLUSIONS Hearing loss in civilian pilots may be associated with noise exposure during the period of service and hours of flight.

scholarly journals Contributions and limitations of using machine learning to predict noise-induced hearing loss

2021 ◽  
Author(s):  
Feifan Chen ◽  
Zuwei Cao ◽  
Emad M. Grais ◽  
Fei Zhao
Keyword(s):  
Machine Learning ◽  
Hearing Loss ◽  
Roc Curve ◽  
Prediction Error ◽  
Noise Exposure ◽  
Model Construction ◽  
Support Vector ◽  
Exposure Level ◽  
Noise Induced Hearing Loss ◽  
Current Review

Abstract Purpose Noise-induced hearing loss (NIHL) is a global issue that impacts people’s life and health. The current review aims to clarify the contributions and limitations of applying machine learning (ML) to predict NIHL by analyzing the performance of different ML techniques and the procedure of model construction. Methods The authors searched PubMed, EMBASE and Scopus on November 26, 2020. Results Eight studies were recruited in the current review following defined inclusion and exclusion criteria. Sample size in the selected studies ranged between 150 and 10,567. The most popular models were artificial neural networks (n = 4), random forests (n = 3) and support vector machines (n = 3). Features mostly correlated with NIHL and used in the models were: age (n = 6), duration of noise exposure (n = 5) and noise exposure level (n = 4). Five included studies used either split-sample validation (n = 3) or ten-fold cross-validation (n = 2). Assessment of accuracy ranged in value from 75.3% to 99% with a low prediction error/root-mean-square error in 3 studies. Only 2 studies measured discrimination risk using the receiver operating characteristic (ROC) curve and/or the area under ROC curve. Conclusion In spite of high accuracy and low prediction error of machine learning models, some improvement can be expected from larger sample sizes, multiple algorithm use, completed reports of model construction and the sufficient evaluation of calibration and discrimination risk.

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 A functional SNP in miR-625-5p binding site of AKT2 3'UTR is associated with noise-induced hearing loss susceptibility in the Chinese population

2021 ◽  
Author(s):  
Long Miao ◽  
Boshen Wang ◽  
Juan Zhang ◽  
Lihong Yin ◽  
Yuepu Pu
Keyword(s):  
Hearing Loss ◽  
Binding Site ◽  
Binding Affinity ◽  
Chinese Population ◽  
Noise Exposure ◽  
Luciferase Reporter ◽  
Exposure Level ◽  
Noise Induced Hearing Loss ◽  
Potential Biomarker ◽  
Increased Risk

Abstract This study aimed to explore the association of several single nucleotide polymorphisms (SNPs) within the AKT2 gene and noise-induced hearing loss (NIHL) susceptibility and explore the potential mechanism underlying NIHL. Three SNPs (rs2304186, rs41275750 and rs76524493) were genotyped in a Chinese population which consists of 690 NIHL patients and 650 normal hearing controls. Bioinformatic analysis was conducted to predict the potential miRNA-binding site of SNPs. Cell transfection and dual-luciferase reporter assay were performed to investigate the potential molecular mechanism of SNPs involved in NIHL. The results revealed rs2304186 GT genotype (OR = 1.41; 95% CI = 1.09–1.83) and TT genotype (OR = 1.51; 95% CI = 1.08–2.10) imparted increased risk of NIHL, and the increased risk could also be found in a dominant model (OR = 1.44; 95% CI = 1.12–1.84). The stratification analysis showed that rs2304186 GT/TT conferred a higher risk for NIHL, especially in subgroups of male, age (35–45 and > 45 years), noise exposure time (> 16 years), and noise exposure level (≤ 85 and ≥ 92 dB), compared with GG genotype. In addition, the haplotype TCCTACT (rs2304186-rs41275750-rs76524493) was associated with NIHL risk (OR = 1.19; 95% CI = 1.02–1.40). Rs2304186 G allele combined with hsa-miR-625-5p mimics could significantly decrease the luciferase activity compared with T allele, indicating rs2304186 altered the binding affinity of hsa-miR-625-5p to SNP rs2304186 mutation region, thus directly targeting AKT2. In conclusion, our study provides evidence for the first time that SNP rs2304186 of AKT2 3′UTR affects NIHL susceptibility by affecting the binding affinity of has-miR-625-5p in an allele-specific manner and it may act as a potential biomarker of NIHL susceptibility.

scholarly journals PROFIL GANGGUAN PENDENGARAN PADA PEMUSIK DI KOTA MANADO

2014 ◽  
Vol 1 (2) ◽  
Author(s):  
Riscky B. Lauw
Keyword(s):  
Hearing Loss ◽  
Noise Level ◽  
Noise Exposure ◽  
Noise Induced Hearing Loss ◽  
Noise Induce Hearing Loss ◽  
Cross Sectional ◽  
Musical Sound ◽  
Keywords Hearing Loss ◽  
Analytical Research ◽  
The City

Abstract: Hearing loss due to noise (Noise Induced Hearing Loss - NIHL) is hearing impairment, either part or all, loss, irreversible, occur in one or both ears, can be mild, moderate or severe, occurs because of exposure to the constant noise from the environment. The musician is one of the communities that are susceptible to noise induced hearing loss. Musicians had considerable exposure to noise. Most musicians have a hearing loss in varying degrees. The research objective is to determine the profile of hearing loss in the musicians in Manado, researching threshold musical sound that can cause hearing loss, and looking for a relationship with duration of music exposure to hearing loss. Research is explanatory research, analytical research methods and cross-sectional approach. Research conducted on hearing music group in the City of Manado. The study involved 30 people with the details of 15 respondents guitar players and 15 drummers. The result is: The degree of noise in the gym most of the 110-130 dB, experienced by 46.7% of respondents, mostly studied band of men which is about 90%. Hearing loss is the most followed by drummer and then gitarist, 46.7% and 36.6%, respectively; based upon long exposure to music,> 5 years 46.6%, based on length of exercise per day, more in the 3-4 hours it is 40%. Based on the result of the study, there is a relationship between noise exposure and hearing loss in musicians in the city of Manado. The noise level, exposure time per day, duration of exposure and vulnerability of respondents, closely related to hearing loss disorder the musicians in this study. Keywords: Hearing loss, the noise level, duration of exposure, musicians.Abstrak: Noise induce hearing loss (NIHL) atau gangguan pendengaran akibat kebisingan adalah gangguan pendengaran baik sebagian atau seluruh pendengaran, bersifat menetap, terjadi pada satu atau dua telinga, dapat bersifat ringan, sedang atau berat, terjadi karena paparan bising yang terus-menerus dari lingkungan. Pemusik adalah salah satu komunitas yang rentan terhadap gangguan pendengaran akibat bising. Pemusik mengalami paparan suara yang begitu besar. Kebanyakan pemusik mengalami gangguan pendengaran dalam berbagai derajat. Tujuan penelitian adalah untuk mengetahui profil gangguan pendengaran pemusik di kota manado, meneliti ambang batas suara musik yang dapat menyebabkan gangguan pendengaran serta mencari hubungan lama paparan musik dengan gangguan pendengaran. Penelitian bersifat Explanatory Research, dengan metode penelitian analitik dan pendekatan cross sectional. Penelitian gangguan pendengaran dilakukan pada kelompok musik di Kota Manado. Penelitian ini melibatkan 30 orang responden dengan rincian 15 pemain gitar dan 15 pemain drum. Hasil yang diperoleh adalah: Derajat kebisingan pada tempat latihan paling banyak antara 110-130 dB, dialami oleh 46,7 % responden, personil band yang diteliti kebanyakan laki-laki yaitu sekitar 90 %. Gangguan pendengaran terbanyak adalah pemain drum diikuti oleh gitaris 46,7 % and 36,6 %. Berdasarkan lama paparan musik, > 5 tahun 46,6 %; berdasarkan lama latihan per hari, lebih banyak pada 3-4 jam yaitu 40 %. Berdasarkan hasil penelitian kesimpulannya, terdapat hubungan antara paparan kebisingan dan gangguan pendengaran pada pemusik di Kota Manado. Tingkat kebisingan, waktu paparan perhari, lama terpapar serta kerentanan responden, berhubungan erat dengan pendengaran pada pemusik pada penelitian ini. Kata kunci: Gangguan pendengaran, tingkat kebisingan, lama paparan, pemusik.

Hearing Protection Devices Use and Its Relationship with Hearing Loss among Steel Industry Workers of Samut Prakan Province, Thailand

2021 ◽  
Vol 104 (3) ◽  
pp. 349-358
Keyword(s):  
Hearing Loss ◽  
Steel Industry ◽  
Noise Exposure ◽  
Weighted Average ◽  
Threshold Level ◽  
Self Report ◽  
Hearing Protection ◽  
Exposure Level ◽  
Cross Sectional ◽  
Protection Devices

Objective: To investigate hearing protection devices (HPDs) use and its relationship with hearing loss among steel industry workers in Thailand. Materials and Methods: The present cross-sectional study included 93 eligible participants who are working in the designated high-noise-level zones, which is 85 or more A-weighted decibels [dB(A)] for eight hours time-weighted average, of the two factories. Self-report forms were used to obtain HPDs use by industry workers and noise exposure level was measured with Spark® (Model 706) noise dosimeter. Audiometric screening for hearing loss was performed at a regional hospital by the qualified technician. The hearing loss in each ear was defined if the average threshold level was found to have exceeded 25 dB(A) at high frequencies of 4 and 6 kHz. Results: The findings showed that 45.2% of workers used earplug, 16.1% used earmuff, and 38.7% used both, and most workers (55.8%) wear HDPs regularly, for six of seven days per week. Fifty seven percent of workers wear HDPs for more than 60% time of an 8-hour work shift. Most workers (75.2%) have hearing loss. Conclusion: The authors’ result revealed that almost half of workers used hearing protection devices and most workers use HPDs during the 8-hour work time. Abnormal hearing ability were found among workers. The education program such as the hazards of noise on potential auditory loss, a noise education training program and full use of HPDs are encouraged to prevent effect of noise on workers. Keywords: Hearing protection devices, Noise induced hearing loss, Steel industry

scholarly journals Influencing Factors of Hearing Disorder in Helicopter and Casa Pilots

2020 ◽  
Vol 2 (5) ◽  
Author(s):  
Nurfitriyana Nurfitriyana ◽  
July Ivone ◽  
Pramusinto Adhy
Keyword(s):  
Hearing Loss ◽  
Noise Exposure ◽  
Secondary Data ◽  
Sound Level ◽  
Aircraft Noise ◽  
Hearing Disorder ◽  
Noise Induced Hearing Loss ◽  
Chi Square ◽  
Cross Sectional ◽  
Cross Sectional Design

Noise-Induced Hearing Loss (NIHL) is a hearing disorder caused by noise. Noise with the intensity of 85 decibels (dB)or higher may damage the corti hearing receptor. Pilot is one of the riskiest occupations due to frequent noise exposure from aircraft machine. This research aimed to identify the influence of aircraft noise levels on hearing disorder of both helicopter and casa pilots. This is observational analytical research with cross-sectional design, involving 30 helicopter pilots and 30 casa pilots. The diagnosis of hearing disorder was done using secondary data from medical records. The aircraft noise was measured by sound level meter, the other risk factors were observed with questionnaire. Data were analyzed by chi-square with ?=0,05. The results showed that aircraft noise (p=0,009; OR=4,929), duration of working period (p=0,026; OR=8,308), and flight hours (p=0,006; OR=3,222) were related with hearing disorder, but not age (p=0,093; OR=3,222). We concluded aircraft noise, duration of the working period, and flight hours are related to hearing disorder of the pilots.   Keywords: hearing disorder; pilot; noise; noise-induced hearing loss

scholarly journals Noise Induced Hearing Loss in Ground Handling Workers at Juanda Airport Surabaya

2020 ◽  
Vol 63 (2) ◽  
pp. 59-63
Author(s):  
Citra Dwi Novastuti ◽  
Nyilo Purnami ◽  
Nugraenny Affianti
Keyword(s):  
Hearing Loss ◽  
Noise Exposure ◽  
Pure Tone Audiometry ◽  
Noise Induced Hearing Loss ◽  
Distortion Product Otoacoustic Emission ◽  
Research Subjects ◽  
Cross Sectional ◽  
Female Ratio ◽  
Distortion Product ◽  
Ground Handling

Background and Objectives The airport ground handling workers are most vulnerable to noise exposure from the sound of aircraft engines that are quite loud and, if exposed continuously, they may experience hearing loss. This study describes the profile of noise induced hearing loss in ground handling workers at Juanda Airport Surabaya.Subjects and Method The descriptive cross sectional approach is employed, and the noise level in the work environment is measured by airport apron, physical ear examination, distortion product otoacoustic emission (DPOAE) and pure tone audiometry, which were conducted for 89 ground handling workers at the airport.Results The age range that experienced hearing loss the most is 50-59 years (19.10%). The male: female ratio of subjects who experienced hearing loss was 50%:53.24%. The highest percentage of subjects with hearing loss was found in the Area II (export-import cargo) with 68%. Workers who experience hearing loss the most have been working for 17-21 years (76%). The ratio of hearing loss between continuous users of ear protectors and occasional or non-users of protectors was 22.47%:30.34%. Of the 89 total research subjects, 47 were found with hearing based on the DPOAE refer results; of these subjects, 30 (33.7%) experienced hearing loss due to noise (NIHL), 9 suffered in the right ear (10.11%), 9 in the left ear (10.11%) and 12 in both ears (13.48%).Conclusion Based on the DPOAE results, 52.81% of the ground handling workers at Juanda airport Surabaya were found with hearing loss; of these workers, 33.7% workers experienced NIHL with 10.11% observed in each ear and 13.48% in both ears.

scholarly journals Noise Exposure and Noise Induced Hearing Loss Among the Traffic Police in Dhaka Metropolitan City

2021 ◽  
Vol 46 (3) ◽  
pp. 219-227
Author(s):  
Abirvab Naha ◽  
Nasima Akhtar ◽  
Pran Gopal Datta ◽  
Mohammad Habibur Rahman ◽  
Riashat Azim Majumder ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Noise Exposure ◽  
Occurrence Rate ◽  
Exposure Level ◽  
Noise Induced Hearing Loss ◽  
Occupational Noise ◽  
Traffic Police ◽  
Metropolitan City ◽  
North And South ◽  
East West

Background: Occupational noise is considered as a global problem with social and physiological impacts, causing noise-induced hearing loss (NIHL). High levels of occupational noise is a problem in all regions of the world. Road traffic produces high noise levels that can cause damage to the traffic police hearing. Hence, occupational hearing loss is a well-known outcome of noise exposure at work. Objectives: The study aimed to measure the noise exposure level at different traffic points and determine the occurrence rate and severity of hearing loss among the traffic police of Dhaka Metropolitan City. Methods: This cross-sectional study was conducted during 2017-2019 in 28 selected traffic points of Dhaka Metropolitan City under four traffic zone (East, West, North, and South) and among 100 traffic police who were working there and met the inclusion and exclusion criteria. Noise exposure level was measured from all selected traffic points with a digital sound level meter. Data were collected by face to face interview with a pretested semi-structured questionnaire followed by an otoscopic examination, tuning fork tests, and a baseline audiogram. To see the association, Chi-square tests or Pearson’s correlation coefficient (r) tests were performed. Results: This study revealed that the average noise exposure level at East, West, North, and South zones are respectively 125.6 dB, 112.9 dB, 121.3 dB, and 119.4 dB. At every point, the noise exposure level was more than the acceptable limit set by the Occupational Safety and Health Administration (OSHA). In the audiometry report of 100 traffic police, 64% had sensorineural hearing loss. Of them 85% had mild, 9% had moderate and 6% with severe hearing loss. Notch in 4 kHz in an audiogram was present in the right ear of 46% of respondents and left ear of 52% respondents. It was observed that hearing loss was significantly associated with increasing age and job duration. Conclusion: Traffic police of Dhaka Metropolitan City is in constant risk of noise induced hearing loss as the ambient noise of this city is very high. Regular assessment and hearing screening is recommended for all the traffic police who are exposed to noise. Bangladesh Med Res Counc Bull 2020; 46(3): 219-227

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