Evaluation of change in knowledge and attitude about noise and its effect on hearing: post awareness programme among adolescents in Varkala, Thiruvananthapuram district, Kerala

Background: There are significant literature evidence across the globe and in India, regarding the effects of recreational noise exposure among young adults and college students, but there is a dearth of literature support regarding its effects among the students of senior grade studying in Indian subcontinent. Since the awareness among school students help in the early preventive measures and hearing conservation, studies must focus on these population to reduce the burden of recreational noise-induced hearing loss on our future generation. This study aims to evaluate the change in knowledge and attitude about noise and its effect on hearing: Post awareness programme among adolescents in Varkala, Thiruvananthapuram district, Kerala. Method: A survey was conducted among the school students within the age group 16-18 years. A questionnaire containing questions related to knowledge and attitude towards noise and its effect on hearing was developed and distributed to the students prior to and after an awareness program making use of a visual awareness material. Wilcoxon signed rank test was used for pre and post comparison. Results: The p value of each aspect related to the knowledge and attitude is less than the significance level, so we can say that there is a significant change in the level of knowledge and attitude after the awareness program. Conclusions: The study highlighted low pre-awareness levels among participants regarding noise's impact on hearing. The awareness program effectively improved understanding, emphasizing its importance for all age groups in dispelling misconceptions and fostering positive attitudes.

Noise exposure abatement: a perspective from industry occupational health risk assessment reports

Background: Occupational health risk assessments are building blocks for occupational health programmes, allowing for the rating of identified risks and the continuous re-evaluation of the effectiveness of abatement measures. In South African industry, occupational health risk assessments are formally documented in reports, which can be presented as demonstration of legal compliance with legislation. Objective: To identify noise abatement measures recorded in noise risk assessment reports of four manufacturing companies and to rate their effectiveness. Methods: We analysed the occupational health risk assessment reports from 21 operational facilities in four South African companies from the manufacturing and utilities sectors to evaluate, through document analysis, the recorded noise abatement measures. Noise abatement measure effectiveness was rated using a preassigned effectiveness percentage scale. Results: Administrative controls and hearing protection devices were the most commonly used noise exposure abatement measures, but hearing conservation programmes were generally poorly formulated. There were inter- and intra-company differences in the qualitative risk assessment approaches used for rating or ranking the noise risk, which led to different risk conclusions and prioritisation outcomes. The calculated control effectiveness of the abatement measures showed that noise exposure remained largely unacceptable: 16 of the 21 operational units had unacceptable noise exposures, four had tolerable exposures, and one had broadly acceptable exposures. Conclusion: The four companies' common noise abatement measures, as elements of formalised hearing conservation programmes, which included administrative controls and hearing protection devices, were not effective in reducing noise exposure to the broadly acceptable level, reflective of limited use of engineering controls.

Prevention of the Evolution of Workers' Hearing Loss from Noise-Induced Hearing Loss in Noisy Environments through a Hearing Conservation Program

Introduction Noise-induced hearing loss (NIHL) is a serious problem for workers and therefore for businesses. The hearing conservation program (HCP) is a set of coordinated measures to prevent the development or evolution of occupational hearing loss, which involves a continuous and dynamic process of implementation of hearing conservation routines through anticipation, recognition, evaluation, and subsequent control of the occurrence of existing environmental risks or of those thatmay exist in the workplace and lead to workers hearing damage. Objective The aim of this study was to evaluate the effectiveness of the HCP in preventing further hearing loss in workers with audiograms suggestive of NIHL. The audiometric tests and medical records of 28 furniture company workers exposed to noise were reviewed and monitored for 2 years. Methods This retrospective, cross-sectional study examined five audiometric tests in the medical records (on admission and every semester) of 28 workers in a furniture company (totaling 140 audiometric exams) following the introduction of the HCP. Results Data analysis showed no differences between the audiometric tests conducted on admission and those performed every semester. Conclusions The HCP implemented was effective in preventing the worsening of hearing loss in workers already with NIHL when exposed to occupational noise. Therefore, such a measure could be useful for the employment of workers with hearing loss in job sectors that have noise exposure.

Medio militar y trastornos auditivos inducidos por ruido / The military environment and noise-induced hearing impairments

En el medio militar el personal se ve sometido a los más altos niveles de ruido; se considera que las detonaciones de las armas de fuego superan en intensidad a todos los ruidos industriales. Este trabajo pretende abordar los factores de riesgo y vulnerabilidad asociados a la exposición al ruido en el ambiente militar, los aspectos más actuales relacionados con la lesión auditiva inducida por ruido y su protección. Se realizó una revisión de los artículos más representativos mediante la base de datos Medline e Hinari, se empleó para la búsqueda y creación de la bibliografía el gestor personal de referencias bibliográficas Procite, referencias al tema en revistas, tesis y referencias en Internet mediante el buscador Google. Los resultados reafirman la vulnerabilidad del personal militar a padecer algún tipo de lesión del aparato auditivo inducida por ruido, originado por los niveles de ruido elevado que se producen en el medio militar, la necesidad de enfocar de forma multidisciplinaria este tipo de lesiones y la importancia de implementar sistemas de protección auditiva eficientes, con el fin de elevar la calidad de vida de los expuestos a ruido y evitar que se produzca la discapacidad auditiva, considerando que la mejor opción es su prevención.

Extremely high noise levels are characteristic of the military environment. Firearm detonations are considered to exceed the intensity of any industrial noise. The paper approaches the risk factors and vulnerabilities associated with exposure to noise in the military environment, as well as the most recent notions about noise-induced hearing injury and hearing protection. A review was conducted of the most representative papers on the topic using databases Medline and Hinari. Bibliography lists were searched for and created using Procite personal bibliographic reference manager. Google search engine was used to find references to the topic in journals, theses and Internet references. Results confirm the vulnerability of military personnel to suffer from noise-induced hearing injuries resulting from the high noise levels occurring in the military environment, the need to approach such injuries in a multidisciplinary manner, and the importance of implementing efficient hearing protection systems, with a view to improving the quality of life of persons exposed to noise and preventing hearing impairment, based on the certainty that prevention is always the best option.

Assessment of noise levels of the equipments used in the dental teaching institution, Bangalore.

Context: In dental practical classes, the acoustic environment is characterized by high noise levels in relation to other teaching areas, due to the exaggerated noise produced by some of these devices and use of dental equipment by many users at the same time. Aims: To measure, analyze and compare noise levels of equipments among dental learning areas under different working conditions and also to measure and compare noise levels between used and brand new handpieces under different working conditions. Materials and Methods: Noise levels were measured and analyzed in different dental learning areas that included clinical, pre-clinical areas and laboratories selected as representatives of a variety of learning-teaching activities. The noise levels were determined using a precision noise level meter (CENTER® 325 IEC 651 TYPE II) with a microphone. The mean of the maxima was determined. The data were collected, tabulated, and statistically analyzed using t tests. Results: The noise levels measured varied between 64 and 97 dB(A).The differences in sound levels when the equipment was merely turned on and during cutting operations and also between used and brand new equipments were recorded. The laboratory engines had the highest noise levels, whereas the noise levels in high-speed turbine handpieces and the low-speed contra angle handpieces were decreased. Conclusion: The noise levels detected in this study are considered to be close to the limit of risk of hearing loss.

The Effects of Knowledge and Attitude about Noise on Hearing Conservation Behavior and Hearing Loss / 대한산업의학회지

This study was conducted to investigate knowledge and attitude factor related to hearing conservation and to evaluate the effect of knowledge and attitude about noise on hearing conservation behavior and hearing loss among workers exposed to noise. We investigated the questionnaires of knowledge and attitude about noise and hearing conservation behavior and hearing loss among 355 study subjects from March, 1998 to June, 1998. The results were as follows; We extracted following 5 factors from 26 questionnaire items of knowledge and attitude about noise; knowledge of noise and concern to the control noise (factor 1), general perceived susceptibility (factor 2), relative perceived susceptibility compared with colleagues(factor 3), concern to the hearing protective devices(factor 4), concern to the hearing and noise assessment (factor 5). Knowledge and attitude factors affecting the hearing conservation behavior were general perceived susceptibility in the case of wearing hearing protective devices and knowledge of noise and concern to the control noise in the case of suggestion for hearing conservation. But, in the case of intentional avoiding noise exposure, concern to the hearing protective devices was a significant factor with concern to the hearing and noise assessment. Knowledge and attitude factors affecting hearing loss in 1 kHz were relative perceived susceptibility compared with colleagues and concern to the hearing protective devices, and in 4 KHz were relative perceived susceptibility compared with colleagues and general perceived susceptibility.

Aplicación y evaluación de una estrategia de intervención en trabajadores expuestos a niveles elevados de ruido / Evaluation and application of a strategy of intervention in workers etposed a highs leveles of noise

En esta investigación se toman 13 trabajadores expuestos a niveles elevados de ruido, en una industria de manufactura del vidrio, los cuales participaron en la implementación y la evaluación de un Programa de Conservación Auditiva (PCA), durante un período de 9 años. Se realizó el diagnóstico de la situación en 1988 tanto ambiental, como de la capacidad auditiva de los trabajadores y luego se implementó el PCA, el cual se evaluó 9 años después (1996). El Programa de Promoción y Capacitación de 826 horas-hombre formación, fue fundamental, ya que se logró concientizara trabajadores y empleadores para poder implementar diferentes medidas del control de la exposición, tales como: reubicación de 2 puestos de trabajo en áreas menos ruidosa, dotación y uso de protección personal adecuada y confortable, traslado de 2 trabajadores a otros departamentos con menor nivel de exposición y construcción e instalación de una cabina de trabajo. Durante el período de 9 años de investigación se practicaron 72 evaluaciones audiométricas con un promedio de 5,5 audiometrías por trabajador. El impacto de las medidas correctivas aplicadas fue la prevención de nuevos casos de Hipoacusia Inducida por Ruido y que no incrementó el grado de lesión auditiva en los casos diagnosticados, a pesar del incremento significativo en la edad y tiempo de exposición del grupo en estudio. Al inicio del estudio el 38,5 por ciento de los trabajadores refirió manifestaciones auditivas y el 23,1 por ciento manifestaciones extra-auditivas, el evaluar el PCA solo el 7,7 por ciento refirió síntomas auditivos y el 100 por ciento no refirió manifestaciones extra-auditivas(AU)

In the present investigation, 13 glass factory workers exposed to loud noise participated in the implementation and evaluation of a Hearing Conservation Program (HCP) during a period of nine years. The environmental conditions as well as the hearing ability of the workers were assessed. At this point, the HCP was implemented, and 9 years later in 1996, it was evaluated. The training and Advancement Program of 826 man training hours was basic because it instilled an awareness in the workers which led to the implementation of measures to control exposure such as: the re-location of two work places in a less noisy area; the equipping of personnel with protective gear; the transfer of two workers to departments with less noise, and the construction of a work stall. During the nine years of research, 72 audiometric tests with an average of 5,5 audiometry per worker were made. The results of the corrective measures taken led to the prevention of new cases of noise-induced hearing loss and the non-increase of the degree of additive impairment in those cases in which impairment had already been diagnosed despite the significant increase in age and exposure time of the group being studied. At the beginning of the study, 38,5 % of the workers complained of impaired hearing and 23,1 % had extra-auditive symptoms of impaired hearing. An evaluation of the HCP, only 7,7 % had auditive symptoms auditive of hearing loss and the whole group (100 %) had no extra-auditive manifestations(AU)

A study on the attitude affecting the preventive behavior for hearing conservation / 예방의학회지

The purpose of this study is to investigate attitude factor related to hearing conservation and to find attitude affecting the preventive behavior for hearing conservation. The research method used in this study was self-administered questionnaire samples of the study were composed of 353 workers exposed noise selected randomly in 10 ship-building manufacturing companies. Authors extracted following 9 factors related hearing conservation from 26 attitude propositions prepared from previous study results and health belief model; (l) general perceived susceptibility, (2) relative perceived susceptibility compared with colleagues, (3) concern to the personal protective devices, (4) perceived severity and concern to the hearing capacity, (5) concern to the hearing and noise assessment, (6) concern to the control noise and hearing conservation, (7) group pressure and reason of wearing protective devices, (8) apathy of hearing loss from noise, (9) knowledge about hearing conservation Attitude factors affecting the preventive health behavior were general perceived susceptibility, concern to the noise control and hearing conservation, and concern to the personal protective devices in the case of wearing personal protective devices. But in the case of avoiding noise exposure as preventive health behavior, perceived severity and concern to the hearing capacity was a significant attitude factor with knowledge about hearing conservation.