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Relevant bibliographies by topics / Noise Occupational / Dissertations / Theses

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Dissertations / Theses on the topic 'Noise Occupational'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Williams, Warwick Hamilton Safety Science Faculty of Science UNSW. "Barriers to occupational noise management." Awarded by:University of New South Wales. Safety Science, 2007. http://handle.unsw.edu.au/1959.4/27368.

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This work undertook the examination of the perceived barriers that exist to the management of occupational noise exposure in the workplace. Exposure to excessive levels of noise results in cumulative damage to the hearing mechanism of the ear and a subsequent hearing loss. This hearing loss is permanent and does not recover over time. Initially the conventional method of addressing or controlling noise exposure was through Hearing Conservation Programs and more recently through Occupational Noise Management Programs that take more of a risk management approach. However, the numbers of new hea

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2

Woltman, Adrianna J. "Assessing the Occupational Noise Exposure of Bartenders." Thesis, University of South Florida, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1595819.

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<p> The Occupational Safety and Health Administration estimates that each year, approximately 30 million people are occupationally exposed to hazardous noise. While many are aware of the noise exposure associated with industrial occupations, there has been little research conducted on bartenders who often work in environments that have high levels of noise. The majority of current published research on occupational noise exposure of bartenders has only evaluated noise levels on one night of business. Bartenders often work multiple days per week, which vary in the amount of patrons and entertai

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3

Jordan, Chris Gyula. "Noise induced hearing loss in occupational motorcyclists." Thesis, University of Ulster, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414070.

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4

Ogunyemi, Adekunle. "Occupational Noise Exposure Evaluation of Airline Ramp Workers." Scholar Commons, 2018. http://scholarcommons.usf.edu/etd/7205.

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Noise exposure is a common hazard to workforce in general although at varying degrees depending on the occupation, as many workers are exposed for long periods of time to potentially hazardous noise. Every year, twenty-two million workers are exposed to potentially damaging noise at work. In 2015 U.S. businesses paid over $1.5 million in penalties for not protecting workers from noise. (OSHA, 2016). There may be a direct or indirect consequence of the possibilities of overexposure to noise notwithstanding the compulsory hearing protection requests for the occupations with potential hazards, a

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5

Green, Deirdre Renee. "Occupational noise exposures of college town restaurant employees." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/1330.

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Previous research evaluating restaurant worker exposure used environmental sound levels, but this does not take into account the temporal variability of restaurant worker exposure. To determine the actual personal exposure of restaurant workers, Quest Noise-Pro or Quest Edge dosimeters were placed on restaurant workers at six downtown Iowa City restaurants. At each participating locally-owned restaurant, workers classified as cooks, counter attendants, bartenders, and waiters participated. A time-weighted average (TWA) exposure per participant per shift was computed using both OSHA and NIOSH c

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6

Naravane, Sayli. "Effect of industrial noise on occupational skill performance capability." Diss., Online access via UMI:, 2009.

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Thesis (M.S.)--State University of New York at Binghamton, Thomas J. Watson School of Engineering and Applied Science, Department of Systems Science and Industrial Engineering, 2009.<br>Includes bibliographical references.

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7

Hay, Melissa Constance. "Noise Exposure in Medical Helicopter Flights." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4331.

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The purpose of this project was to evaluate noise exposures of helicopter pilots, nurses and paramedics at a hospital by collecting area and personal samples, determining noise levels inside the helmet, and evaluating the current selection of personal protective equipment (PPE). Measurements gathered during personal sampling were statistically analyzed and calculated using OSHA 1910.95 App A to determine dose, reference duration and the Time-Weighted Average (TWA). Using a mannequin head, with the noise dosimeters in the ears, tests were performed on the headset inside the helmets to determine

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8

Körning, Ljungberg Jessica. "Psychological responses to noise and vibration." Doctoral thesis, Umeå universitet, Folkhälsa och klinisk medicin, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-915.

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Vehicle drivers are a group of workers that are exposed to noise and whole-body vibration (WBV) several hours a day. Some drivers may also be exposed to high mental loads – monitoring and manipulating physical controls while engaging problem solving activities often with strong short-term memory and spatial manipulation components. Present standards and regulations that govern health risk assessment do not take into consideration the complexities of these multiple exposure environments. The effect of one factor (for example, noise or WBV) may be different than the effect of two factors present

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9

Brown, Colin. "A Comprehensive Noise Characterization in a High School." University of Toledo Health Science Campus / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=mco1290020463.

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10

Smith, Eugene N. "Skid Loader Noise Exposure Assessment in a Confinement Dairy Barn." University of Toledo Health Science Campus / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=mco1290038578.

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11

Bork, Brian L. "Evaluation of management practices to minimize occupational noise exposure at Company XYZ." Menomonie, WI : University of Wisconsin--Stout, 2005. http://www.uwstout.edu/lib/thesis/2005/2005borkb.pdf.

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12

Woltman, Adrianna J. "Assessing the Occupational Nosie Exposure of Bartenders." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5800.

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The Occupational Safety and Health Administration estimates that each year, approximately 30 million people are occupationally exposed to hazardous noise. While many are aware of the noise exposure associated with industrial occupations, there has been little research conducted on bartenders who often work in environments that have high levels of noise. The majority of current published research on occupational noise exposure of bartenders has only evaluated noise levels on one night of business. Bartenders often work multiple days per week, which vary in the amount of patrons and entertainmen

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13

Dal, Ufuk. "Assessment Of Occupational Noise Exposure Of A Plant In Oil Industry." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12611997/index.pdf.

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Noise, which is a noteworthy problem in the world of workers, influences the health, safety, productivity and efficiency of those working in heavy industries and especially those working in petroleum industry. The objective of this study is to reassess the protective measures, taken previously by the company, from the point of view of the negative effects of noise on the workers. For this purpose, two approaches are adopted. Firstly, through questionnaires (response rate: 86%) distributed to workers, their subjective rating of, the noise levels to which they are exposed, the factors affecting

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14

Estill, Cheryl Fairfield. "Are Noise and Neurotoxic Chemical Exposures Related to Workplace Accidents?" University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439282244.

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15

Goley, George. "Investigation and Improvement of Occupational and Military Noise Exposure Guidelines: Evaluation of Existing and Modified Noise Exposure Metrics Using Historical Animal Data." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1275924272.

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16

Witherspoon, Melisa Kay. "Noise Exposure Assessment of an Ohio Farm Family: A Pilot Project." Connect to full-text via OhioLINK ETD Center, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=mco1149007085.

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Thesis (M.S.)--Medical University of Ohio, 2006.<br>"In partial fulfillment of the requirements for the degree of Master of Science in Occupational Health." Major advisor: Sheryl Milz. Includes abstract. Document formatted into pages: iv, 110 p. Title from title page of PDF document. Bibliography: pages 72-86.

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Chan, Sze-wen Vanessa. "Occupational hearing loss in Hong Kong : screening with distortion product otoacoustic emission /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2200838X.

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18

Masterson, Elizabeth A. "Prevalence of Workers with Shifts in Hearing by Industry: A Comparison of Occupational Noise Exposure Regulation Criteria." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1328890418.

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19

Lundquist, Pär. "Classroom noise : exposure and subjective response among pupils /." Umeå : Univ, 2003. http://www.arbetslivsinstitutet.se/pdf/030514_lundquist_avh.pdf.

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20

Cross, James A. "A comparison of sound exposure profiling with the basic sound survey as applied in an academic laboratory environment." Oklahoma City : [s.n.], 2003. http://library.ouhsc.edu/epub/theses/Cross-James-Allyn.pdf.

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21

Pierson, Austin Isamu. "Noise exposure for bus drivers in an Iowa City transit system." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/6485.

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General noise regulations and guidelines protect workers against 8-hour time-weighted average noise exposures > 85-90 dBA that can cause health outcomes and noise induced hearing loss (NIHL), but the bus transportation industry has guidelines limiting lower noise exposures > 75-80 dBA to reduce safety hazards, including distraction and poor communication. These hazards can create dangerous driving conditions, especially for urban bus drivers, potentially causing a collision. Further research was necessary to characterize U.S. urban transit bus driver noise exposures to assess whether they exce

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22

Garcia, Monica Elisa. "Occupational Noise Exposure Evaluation of a group of Groundskeepers at a University Campus." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6704.

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Every year, twenty-two million workers are exposed to potentially damaging noise at work. Last year, U.S. businesses paid more than $1.5 million in penalties for not protecting workers from noise. (OSHA, 2016). In the United States ten million people have some kind of noise related hearing loss (CDC, 2016) and noise damage to the ear may not be detected until it is great enough to cause hearing impairment. Grounds keeper’s functions consist of a variety of activities that require the use of powered tools such as mowers, riding mowers, leaf blowers, pressure washers, trimmers/edgers and chainsa

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Lavender, Brandon Dewayne. "Assessing Occupational Noise Exposure of Service members in Aerospace Ground Equipment (AGE) Maintenance." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6294.

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Noise exposure is one of the most common hazards in the work force. There are multiple occupations that experience large amounts of noise exposure to its employees on a regular basis. Flight ground crews and flight maintenance personnel are among the nosiest jobs that exist. Despite the mandatory hearing protection requirements for a job of this caliber, there still remains a chance of an over exposure to noise. Most of the exposure comes from the different types of loud repair equipment and tools, but the greatest exposure comes from a jet engine that can reach 140 decibels. Flight maintenanc

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24

Song, Chaojie. "Occupational noise exposure and the risk of diabetes, rheumatoid arthritis, and cardiovascular disease." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44177.

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Occupational noise exposure is associated with an increased risk of cardiovascular disease. A biological model explains this association through a general stress reaction and the dysregulation of otherwise normal psychoneuralhormonal pathways. Given this evidence and the hypothesized link between stress and metabolic disorders or immunologic response (i.e. inflammation) we hypothesized that risk of diabetes and arthritis are elevated in those exposed to noise at work. Cases and controls were drawn from the National Population Health Survey (NPHS), a longitudinal survey conducted by Statistics

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Nassrallah, Flora G. "Measurement of Occupational Sound Exposure from Communication Headsets." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34577.

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Increased use of communication headsets found in various workplaces raises concerns regarding exposure to potentially hazardous noise levels. Current national and international standards specify a wide range of simple and specialized methods for the measurement of sound exposure under communication headsets. However, to date, quantitative data comparing the degree of agreement between the different measurement methods or their relative performance are lacking, and it is not known if occupational health and safety (OHS) or hearing loss prevention (HLP) stakeholders have the necessary training a

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26

Crawford, Kathryn J. "Assessment of noise in a medical intensive care unit." Thesis, University of Iowa, 2016. https://ir.uiowa.edu/etd/2061.

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Exposure to noise in hospital intensive care units (ICUs) can disrupt patients’ sleep and delay their recovery. In this intervention study, noise levels were measured in eight patient rooms of a medical ICU (MICU) every minute with sound level meters for eight weeks before and after an intervention. Implemented over six weeks, the intervention was designed to educate nurses and other staff members to reduce noise levels through behavior modification, including instituting a “quiet time” in the afternoons, encouraging patients to keep televisions off or at lower volumes, and speaking more quiet

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27

Nahid, Musarrat. "Occupational noise induced hearing loss and engineered noise control : knowledge and perception in the food products manufacturing industry in British Columbia." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/12650.

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Workplaces primarily rely on hearing protection devices (HPDs) for prevention of occupational noise induced hearing loss (NIHL). This study was initiated to investigate the potential barriers to the implementation of engineered noise control (ENC) which is considered to be the best prevention measure. The study investigated knowledge and perception about NIHL and ENC among decision-makers and workers in the food products manufacturing industry in British Columbia. We contacted company Health and Safety Departments. They were sent packages of questionnaires and return envelopes for distribution

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28

Niall, Paul Damien. "The effects of industrial ototoxic agents and noise on hearing." Thesis, Electronic version, 1998. http://hdl.handle.net/1959.14/31931.

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Thesis (M. Sc.) -- University College London, 1998.<br>A project submitted (to the Institute of Laryngology and Otology) as a requirement for the degree of Master of Science in Audiological Medicine, University College London. Bibliography: leaves 83-101.

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29

Sjödin, Fredrik. "Noise in the preschool : health and preventive measures." Doctoral thesis, Umeå universitet, Yrkes- och miljömedicin, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-61442.

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This thesis is based on noise recordings and health evaluations carried out at preschools in the northern part of Sweden. Sound level recordings were made on individuals and by use of stationary devices in dining rooms and play halls. Health evaluations were based on ratings by use of questionnaires and by analyses of cortisol. The average equivalent individual noise exposure was 71 dB(A). The average equivalent noise levels in the dining room and playing halls were 64 dB(A). The hearing loss of the employees was significantly higher for the frequencies tested than in an unexposed control grou

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30

Taylor, Jessica Lee. "Evaluation of Noise in a College Football Stadium." University of Toledo Health Science Campus / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=mco1461862690.

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31

Hsiung, Pey Yuan (Emily). "The relationship between occupational noise exposure and stress in long-term care facility workers." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44035.

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The sound characteristics of many healthcare settings have been documented to be very poor. There has been extensive research about the adverse effects of noise, especially on patients in acute care settings, but little research has examined long-term residential care workers’ exposure to noise. Excessive noise exposure has been associated with burnout in critical care nurses as well as with health problems, such as adverse cardiovascular effects. However, there is a lack of research evaluating the effects of occupational noise exposure on healthcare providers’ health status and stress levels.

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32

Chan, Sze-wen Vanessa, and 陳思韻. "Occupational hearing loss in Hong Kong: screening with distortion product otoacoustic emission." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31251067.

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33

Gladieux, Desiree. "Characterization of Noise Exposure for High-Volume Restaurant Workers." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5952.

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Occupational hearing loss resulting from noise exposures encountered in the workplace affects millions of workers and costs hundreds of millions of dollars annually in Workers’ Compensation costs in the United States alone. Some industries have been well studied, and the presence of hazardous noise in the work environment established and documented. The restaurant industry is one in which little current data exists, but in which there may be cause for concern. This work sought to quantify noise exposures for cooks, servers, and dishwashers and to determine whether or not any of these workers a

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34

Huang, Yuzhang, and 黄羽张. "Effect of earplug use and factors associated with noise induced hearing loss among occupational workers in Guangzhou, China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B48423397.

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Background: Noise is one of the most important forms of environmental pollution among developed and developing countries. A report from UK National Study of Hearing estimated that around 440 million people suffer from noise induced hearing loss in EU countries with 1–1.6 million disability-adjusted life year lost. In China, the Second China National Sample Survey on disability in 2007 revealed that about 27.8 million people suffered from hearing impairment, and 73.4% of which (about 20 million) were diagnosed with disability. The prevalence of hearing impairment was estimated to be 2.1% in t

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35

Khani, Jazani Reza. "Occupational noise as an indicator of environmental quality, political change, and management practice in Tehran." Thesis, University of Salford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301439.

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36

Watson, J'ai. "Impact of Noise on Nurses in Pediatric Intensive Care Units." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378393887.

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37

Hallett, Laura Ann. "Design and laboratory evaluation of an inexpensive noise sensor." Thesis, University of Iowa, 2017. https://ir.uiowa.edu/etd/5768.

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Noise is a pervasive workplace hazard that varies spatially and temporally. Hazard mapping is a useful way to communicate intensity and distribution of noise sources in the workplace. These maps can be created using a stationary network of sensors, although the cost of noise measurement instruments has prohibited their use in such a network. The objectives for this work were to (1) develop an inexpensive noise sensor (<$100) that measures A-weighted sound pressure levels within ±2 dBA of a Type 2 sound level meter (SLM, ~$1,800); and (2) evaluate 50 noise sensors before field deployment as par

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38

Humann, Michael Jerome. "Hearing loss and task-based noise exposures among agricultural populations." Diss., University of Iowa, 2011. https://ir.uiowa.edu/etd/986.

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Hazardous noise exposures and hearing loss have been documented among farmers and farm workers for many years. However, little is known about the noise exposures during specific agricultural work tasks and their effect on hearing loss. The objective of this dissertation was to assess the effects of specific agricultural tasks on hearing loss and their contribution to total noise exposures. Three studies were conducted to accomplish this objective. The first study examined associations between hearing sensitivity among rural residents (nfarmer = 960, nnon-farmers = 608) and self-reported years

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39

Duarte, Alexandre Scalli Mathias 1982. "Estudo comparativo de exames audiométricos de trabalhadores de cinco categorias profissionais." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/313011.

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Orientador: Reinaldo Jordão Gusmão<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas<br>Made available in DSpace on 2018-08-28T02:13:31Z (GMT). No. of bitstreams: 1 Duarte_AlexandreScalliMathias_M.pdf: 1456659 bytes, checksum: 02d867305f679922c5ce3ca16dccc79a (MD5) Previous issue date: 2015<br>Resumo: Introdução: O ruído é considerado a terceira maior causa de poluição ambiental e pode ser visto como um risco de agravo à saúde. A Organização Mundial da Saúde estima que 10% da população mundial está exposta a níveis elevados de pressão sonora potenci

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Biagio, Leigh. "Slow cortical auditory evoked potentials and auditory steady-state evoked responses in adults exposed to occupational noise." Diss., Pretoria : [s. n.], 2009. http://upetd.up.ac.za/thesis/available/etd-02222010-133535.

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Dubin, Stacie R. Dubin. "Characterization and Perceptions of Noise in Nursing Homes." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1513362995616053.

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Tsui, Mei-sze Betty. "The application of cortical evoked response audiometry in the diagnosis of occupational deafness compensation applicants in Hong Kong /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B22008366.

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Messerli, Andrew P. "High School Band Directors’ Sound Exposure Levels Relative to the Occupational Safety and Health Administration (OSHA) Workplace Standards." Bowling Green State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1205934918.

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Barnwell, Mackenzie S. "Evaluation of Occupational Exposure to In-Bus Traffic Related Air Pollution Concentrations and Noise Levels for Bus Drivers." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1623166803096552.

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45

Ferreira, Nelly Foster. "Análise dos níveis de ruído produzidos pelas canetas de alta rotação nas freqüências de bandas de oitavas e as atenuações dos protetores auriculares /." Araçatuba : [s.n.], 2005. http://hdl.handle.net/11449/95411.

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Orientador: Artênio José Isper Garbin<br>Banca: Renato Moreira Arcieri<br>Banca: Edgard Michel Crosato<br>Resumo: O aumento das fontes produtoras de ruído tem prejudicado a qualidade de vida dos profissionais, acelerando a deterioração do aparelho auditivo, podendo causar lesões irreversíveis, dependendo da intensidade do ruído e do tempo de exposição. O objetivo do presente estudo foi analisar o nível de ruído de 3 marcas diferentes de instrumentos de alta rotação, e identificar qual será o menos lesivo ao profissional e, ainda, verificar as atenuações produzidas por protetores auriculares ti

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Dias, Adriano. "Associação entre perda auditiva induzida pelo ruído e zumbido /." Botucatu : [s.n.], 2004. http://hdl.handle.net/11449/98491.

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Orientador: Ricardo Carlos Cordeiro<br>Resumo: Verificar a associação entre PAIR e a queixa de zumbido em trabalhadores expostos ao ruído ocupacional. Método: Foram entrevistados e avaliados trabalhadores com histórico de exposição ao ruído ocupacional atendidos me dois ambulatórios de audiologia. Estudou-se a existência de associação entre PAIR e a ocorrência de zumbido por intermédio do ajuste de um modelo de regressão logística tendo como variável dependente o zumbido e como variável independente a PAIR, classificada em 6 graus, controlada pela covariável idade. Resultados: Os dados foram c

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Dias, Adriano. "Exposição ao ruido ocupacional e saude dos trabalhadores." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/311753.

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Orientador: Ricardo Cordeiro<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas<br>Made available in DSpace on 2018-08-10T04:52:01Z (GMT). No. of bitstreams: 1 Dias_Adriano_D.pdf: 1797501 bytes, checksum: effde01c2013242dc07df67485644926 (MD5) Previous issue date: 2007<br>Resumo: O objetivo deste estudo foi verificar se a exposição ocupacional ao ruído é um fator de risco relevante para acidentes do trabalho. O resultado desta pesquisa foram três artigos científicos. O primeiro teve por objetivo promover uma revisão da literatura nacional de acesso eletrôn

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Olive, Darlene W. "Association Between Smoking, Chemical Exposure and Hearing Loss in an Occupational Setting." VCU Scholars Compass, 2006. http://hdl.handle.net/10156/1920.

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Oliveira, Priscila Feliciano de. "Avaliação do handicap em trabalhadores com perda auditiva induzida por ruído." Pontifícia Universidade Católica de São Paulo, 2007. https://tede2.pucsp.br/handle/handle/12135.

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Made available in DSpace on 2016-04-27T18:12:25Z (GMT). No. of bitstreams: 1 Priscila Feliciano de Oliveira.pdf: 298919 bytes, checksum: d19d00fc10c4a2440c760088e47f3528 (MD5) Previous issue date: 2007-10-10<br>Introduction: Continuous exposure to loud sound pressure levels can cause noise-induced hearing loss (NHIL) and consequently affect the quality of life for these subjects. The handicap of hearing loss has a psychological effect characterized by isolation, stress, difficulties with family relationships, anxiety, sleep difficulties, less confidence and depression. Objective: This resear

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Fitzgerald, Aiyanna. "Assessing Excessive Noise Exposure of Music-Oriented Nightclub Employees." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6237.

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Much research has gone into noise-induced hearing loss (NIHL) and the effects of high intensity noise levels on the hearing mechanism of individuals. A study by the National Institutes of Health has established that high intensity sounds can cause hearing damage of either a temporary, or worse, a permanent nature; regardless of the age of the person. While sound levels below 75 decibels are considered comparatively harmless and have been found not to cause any kind of permanent hearing loss; sound levels greater than 85 de

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