Download or read book Noise sound Without Value written by Federal Council for Science and Technology (U.S.). Committee on Environmental Quality and published by . This book was released on 1968 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Noise Sound Without Value written by Federal Council for Science and Technology (U.S.). Committee on Environmental Quality and published by . This book was released on 1968 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Noise written by United States. Federal Council for Science and Technology. Committee on Environmental Quality and published by . This book was released on 1968 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Traditional Rating of Noise Versus Physiological Costs of Sound Exposures to the Hearing written by H. Strasser and published by IOS Press. This book was released on 2005-09-08 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: In occupational safety and health acts, ordinances, regulations, directives, standards and guidelines, A-weighted sound exposures, varying in level and duration, are traditionally converted to an 8-hour-average sound level by applying the 3-dB exchange rate. Under the prerequisite that the energy equivalent rating level does not exceed 85 dB(A)/8 h, even impulse noise exposures of up to 140 dB are declared harmless. Indeed, the mutual settlement of level and duration based on the concept of energy equivalence is correct as far as sound energy or physical dose is concerned. However, between this principle and work physiological and work psychological, i.e. ergonomics paradigms, some decisive discrepancies do exist. People react to exposures according to human characteristics rather than 'function' according to the laws of physics as they apply to inert matter. This has been demonstrated by a series of new experimental approaches, in which temporary threshold shifts and their restitution associated with various energy equivalent noise exposures have been measured. Also the impact of various types of loud music has been investigated. In addition to the conventionally determined maximum threshold shift, TTS2, and the time it takes to reach the resting hearing level again, the area under the restitution curve, indicate the total physiological costs the hearing has to pay for a preceding sound exposure. This book is an attempt to increase the transparency in existing evaluation methods and – in the interest of pertinent disclosure of risks associated with common procedures – to work towards the elimination of unacceptable simplifications and dangerously erroneous assessments.
Download or read book The Effects of Noise on Man written by Karl D. Kryter and published by . This book was released on 1970 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Noise Sound Without Value written by and published by . This book was released on 1968 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Noise Sound Without Value written by Queensland Conservation Council and published by . This book was released on 1978 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Information on Levels of Environmental Noise Requisite to Protect Public Health and Welfare with an Adequate Margin of Safety written by United States. Office of Noise Abatement and Control and published by . This book was released on 1974 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Noise Pollution written by Enda Murphy and published by Newnes. This book was released on 2014-04-21 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental Noise Pollution: Noise Mapping, Public Health and Policy addresses the key debates surrounding environmental noise pollution with a particular focus on the European Union. Environmental noise pollution is an emerging public policy and environmental concern and is considered to be one of the most important environmental stressors affecting public health throughout the world. This book examines environmental noise pollution, its health implications, the role of strategic noise mapping for problem assessment, major sources of environmental noise pollution, noise mitigation approaches, and related procedural and policy implications. Drawing on the authors' considerable research expertise in the area, the book is the first coherent work on this major environmental stressor, a new benchmark reference across disciplinary, policy and national boundaries. Highlights recent developments in the policy arena with particular focus on developments in the EU within the context of the European Noise Directive Explores the lessons emerging from nations within the EU and other jurisdictions attempting to legislate and mitigate against the harmful effects of noise pollution Covers the core theoretical concepts and principles surrounding the mechanics of noise pollution as well as the evidence-base linking noise with public health concerns
Download or read book Noise written by États-Unis. Federal council for science and technology. Committee on environmental quality and published by . This book was released on 1968 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Noise and Noise Control written by Crocker and published by CRC Press. This book was released on 2018-10-24 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written more for the practitioner than the casual reader. Although a high mathematical level is not needed, for much of the material some engineering knowledge is desirable. Noise control is not easy and there are no magic answers to problems. Careful study and patience are required to produce proficiency in the field of noise control.
Download or read book Noise and Hearing written by Charles D. Yaffe and published by . This book was released on 1961 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The relationship of changes in hearing acuity to long-term exposure to industrial noise was studied in Federal penitentiaries during the period 1953-59 by the Division of Occupational Health of the U.S Public Health Service. The workers studied were employed in textile mills; wood products and sheet metal products manufacturing; brush, shoe, and clothing factories; and printing. Overall noise levels in these operations ranged from approximately 75 to 110 decibels. Men employed in these plants had their hearing tested periodically. A group of approximately 600 men was maintained during the course of the study. Since replacements were made to take care of turnover, data were collected on 1, 952 different individuals during the study. Of these, 1,070 had preemployment audiograms. Approximately 12,000 men had their hearing tested at the time of admission to the penitentiaries. Findings are compared with four well-known proposed sets of criteria. For hearing conservation purposes the findings are in agreement with the recommendations of the Subcommittee on Noise of the American Academy of Ophthalmology and Otolaryngology and Air Force Regulation 160-3. In general, the damage risk criteria proposed by Rosenblith and Stevens for Broad band noise are also confirmed. The theory that narrow band noise requires more stringent criteria is not substantiated by the findings of these studies. Approximately half of commonly encountered industrial noise would be classed as narrow band by this definition. The lower limit of 50 sones per octave band does not always provide sufficient protection.
Download or read book Hearing Loss written by National Research Council and published by National Academies Press. This book was released on 2004-12-17 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: Millions of Americans experience some degree of hearing loss. The Social Security Administration (SSA) operates programs that provide cash disability benefits to people with permanent impairments like hearing loss, if they can show that their impairments meet stringent SSA criteria and their earnings are below an SSA threshold. The National Research Council convened an expert committee at the request of the SSA to study the issues related to disability determination for people with hearing loss. This volume is the product of that study. Hearing Loss: Determining Eligibility for Social Security Benefits reviews current knowledge about hearing loss and its measurement and treatment, and provides an evaluation of the strengths and weaknesses of the current processes and criteria. It recommends changes to strengthen the disability determination process and ensure its reliability and fairness. The book addresses criteria for selection of pure tone and speech tests, guidelines for test administration, testing of hearing in noise, special issues related to testing children, and the difficulty of predicting work capacity from clinical hearing test results. It should be useful to audiologists, otolaryngologists, disability advocates, and others who are concerned with people who have hearing loss.
Download or read book Noise Sound Without Value written by Federal Council for Science and Technology (U.S.) and published by . This book was released on 1968 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineering Acoustics written by Michael Möser and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Suitable for both individual and group learning, Engineering Acoustics focuses on basic concepts and methods to make our environments quieter, both in buildings and in the open air. The author’s tutorial style derives from the conviction that understanding is enhanced when the necessity behind the particular teaching approach is made clear. He also combines mathematical derivations and formulas with extensive explanations and examples to deepen comprehension. Fundamental chapters on the physics and perception of sound precede those on noise reduction (elastic isolation) methods. The last chapter deals with microphones and loudspeakers. Moeser includes major discoveries by Lothar Cremer, including the optimum impedance for mufflers and the coincidence effect behind structural acoustic transmission. The appendix gives a short introduction on the use of complex amplitudes in acoustics.
Download or read book Towards an Understanding of Tinnitus Heterogeneity written by Christopher Cederroth and published by Frontiers Media SA. This book was released on 2019-07-19 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tinnitus is the perception of a sound when no external sound is present. The severity of tinnitus varies but it can be debilitating for many patients. With more than 100 million people with chronic tinnitus worldwide, tinnitus is a disorder of high prevalence. The increased knowledge in the neuroscience of tinnitus has led to the emergence of promising treatment approaches, but no uniformly effective treatment for tinnitus has been identified. The large patient heterogeneity is considered to be the major obstacle for the development of effective treatment strategies against tinnitus. This eBook provides an inter- and multi-disciplinary collection of tinnitus research with the aim to better understand tinnitus heterogeneity and improve therapeutic outcomes.
Download or read book Assessment of noise level at the Ondo State School of Health Technology written by Samuel Olufade and published by GRIN Verlag. This book was released on 2018-01-12 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Project Report from the year 2016 in the subject Physics - Acoustics, grade: 3.56, , language: English, abstract: This study was carried out in order to investigate the noise level at the Ondo State School of Health Technology, Akure. Prospective study design was adopted for this study and noise level meter was used to collect data and simple random sampling technique was used. The school was divided into 4 sections which are Academic, commercial, administrative, and residential sections and a sample size of 100 was determined, the retrieved questionnaire were sorted and analyzed using tables and bar charts. During the course of sampling with noise level meter, it was noted that noise coming from the commercial section was higher than any other section and ranged between 80dB and 89dB which is above the threshold limits man can be exposed to due to the operations carried out in the section. However, at night it was measured to be at lowest level of 49dB based on the close of commercial activities around 7pm daily. In the residential section it was noted that the level of noise produced between the hours of 10am and 1pm was the lowest but from the hour of 2pm upward the noise was at its peak based on the presence of the student in their various lodge ranging between 65dB to 79dB at the academic section the noise level range between 45dB to 60dB which means that the noise levels is low at the section. In the administrative section, the noise produced was between 45dB and 50dB which means that the noise level was at the lowest level for the entire school environment. In the questionnaire people′s knowledge and perception was measured, sorted and analyzed which shows that noise level is high at the ondo state school of Health Technology which should be minimized to enhance a good and conducive environment for learning/teaching.
