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Cloueuses portatives - Développement de méthodes de diagnostic vibratoire et acoustique
Le fonctionnement des cloueuses portatives étant basé sur un processus d'impact visant à enfoncer un clou, l'utilisation de ces outils expose les travailleurs à des bruits et à des vibrations à caractère impulsionnel, en générant des niveaux très élevés pendant un très court laps de temps. Par ailleurs, l'exposition aux bruits et aux vibrations impulsionnels engendre un risque de développer des maladies professionnelles. Des échanges avec l'Association paritaire pour la santé...
Buy Quiet Update
Several years ago NIOSH started the planning process for a “buy quiet” initiative to encourage companies to purchase or rent quieter machinery and tools to reduce worker noise exposure. This initiative also aimed to provide information on equipment noise levels and promote manufacturers to design quieter equipment. NIOSH is now pleased to announce the official launch of our Buy Quiet web resources, complete with a website and educational materials. The new, easy to use materials highlight the benefits of a Buy Quiet program, explain how to establish a program in a workplace, and provide...
A Job-Exposure Matrix for Occupational Noise: Development and Validation
Objective : To develop a job-exposure matrix (JEM) for occupational noise in Sweden and to estimate its validity. Methods : The JEM, developed by a group of experienced occupational hygienists, contains 321 job families with information regarding occupational noise from 1970 to 2004. The occupational noise information derives from measurements collected from different sources. The time period label has a 5-year scale starting in 1970. The estimated average 8h (TWA) noise level in decibel [dB(A)] for every 5-year period was coded either as <75 dB(A), 75–84 dB(A), or ≥85 dB(A) and the...
Current Practice in health surveillance for noise
The aims of this study were to provide an indication of the quality and range of current practice in the delivery of health surveillance for workers exposed to noise at work in Great Britain. The establishment of noise health surveillance was found to be conducted in a proactive manner with respondents demonstrating their knowledge of the importance and the value of risk assessment. Additionally, communication was seen as a vital component to the effectiveness and success of any noise health surveillance programme. Variations in practitioner training, background and the setting in which they work...
Sound Pressure Levels in Rooms: A Study of Steady State Intensity, Total Sound Level, Reverberation Distance, a New Discussion of Steady State Intensity and Other Experimental Formulae
In this publication we include all, or almost all, the valid formulas of sound levels in different types of rooms. We will explain all the theoretical basis of each of them, starting with reflected intensity, both classical and revised theories, the total sound level and its uses in concert venues. We will also deal with empirical formulas mainly for classrooms, churches and religious buildings and industrial use. However, the main significance of this work is not only the wide range of formulas exposed but also that we have found the explanation of why the reverberation radius, or distance radius...
Patient and staff perceptions of hospital noise
A large scale survey of noise and acoustic conditions in a range of inpatient hospital wards has been undertaken in two major hospitals in the UK. The survey involved noise and acoustic surveys of occupied hospital wards, identification of noise sources and questionnaire surveys of nursing staff and patients. The surveys were carried out in a range of different ward types, including surgical and medical wards, and ward sizes. This paper will present the results of the questionnaire surveys relating to noise annoyance and disturbance among staff and patients. Factors which affect perceptions of...
Reducing Exposure to Lead and Noise at Outdoor Firing Ranges
The National Institute for Occupational Safety and Health (NIOSH) recently published recommendations for reducing exposure to lead and noise at indoor firing ranges [NIOSH 2009]. However, workers and users of outdoor firing ranges may be exposed to similar hazards. This followup document examines exposures at these ranges and recommends steps to reduce such exposures. Source : http://www.cdc.gov/niosh/docs/wp-solutions/2013-104/pdfs/2013-104.pdf
Noise control applications of novel material made of jute : reduction of radiated noise levels of 6 dB and 10 dB
Material used for noise control applications should possess good sound absorption and dampening properties. In this work, the authors have focused on noise control applications of novel material made of jute which is a readily available, cheap and biodegradable natural fiber. Based on physical, flammable and acoustical properties, jute felt shows good sound absorption properties which has been used for noise control in a domestic clothes dryer and a vacuum cleaner. The noise sources in these appliances were ranked by measuring their radiated sound intensity levels. An overall reduction of radiated...
In Ireland, the average bar employee daily noise exposure is almost 4 times more than the accepted legal limit
Due to the transposition of the EU Directive 2003/10/EC into Irish Law, the entertainment sector was obligated to comply with the requirements of the Safety, Health and Welfare at Work (General Application) Regulations 2007, Chapter 1 Part 5: Control of Noise at Work since February 2008. Compliance with the Noise Regulations was examined in 9 nightclubs in Ireland. The typical daily noise exposure of 19 bar employees was measured using 2 logging dosimeters and a Type 1 fixed position sound level meter. Physical site inspections identified nightclub noise control measures. Interviews and questionnaires...
Hearing, sound fatigue and annoyance highly affected employees at the preschools.
Hearing impairments and tinnitus are being reported in an increasing extent from employees in the preschool. The investigation included 101 employees at 17 preschools in Umeå County, Sweden. Individual noise recordings and stationary recordings in dining rooms and play halls were conducted at two departments per preschool. The effects of noise exposures were carried out through audiometric screenings and by use of questionnaires. The average individual noise exposure was close to 71 dB (A), with individual differences but small differences between the preschools. The noise levels in the dining...
Buy-Quiet Process Roadmap REVISED
The NASA Buy-Quiet process helps you develop requirements for low-noise equipment that is efficient, cost-effective, and, most importantly, safe for the people who work with and around it. Like most processes, this one can get pretty long and complicated, so use this roadmap to find your way through it! The Roadmap is a tool that supports the procurement of low-noise products, which is an important aspect of a strong engineered noise controls program. It is assumed that the Roadmap , and the Buy-Quiet program that guides its application, will be implemented in the context of a comprehensive hearing...
Dental personnel in Thailand are exposed to noise intensities lower than occupational exposure limits.
This cross-sectional study was performed in the Dental School of Prince of Songkla University to ascertain noise exposure of dentists, dental assistants, and laboratory technicians. The peaks of the noise spectrum of dental instruments were at 1,000, 4,000, and 8,000 Hz which depended on the type of instrument. Noise measurement in the personal hearing zone found that the laboratory technicians were exposed to the highest impulsive noise levels (137.1 dBC). The dentists and dental assistants who worked at a pedodontic clinic had the highest percent noise dose (4.60 ± 3.59%). In the working...
Study on the impact of exposure to noise in professional snipers
Facing an increasing violence level and higher firepower in the hands of criminal organizations (especially those related to drug trafficking), the Military Police of Pernambuco has created, in 1989, the “1a Companhia Independente de Operações Especiais” (1st Independent Company of Special Operations), as a tactical last resort of the Police to be used on special, complex situations. The CIOE progressively makes use of Negotiation measures, of less-than-lethal maneuvers, of Precision Shots and Tactical Assaults. When all possibilities are drained, the Precision Shot will...
Using a Starter Pistol, generates 166dB impulse noise (peak )at 0.5m
At the shooters ear a blocked barrel .22 caliber Starter Pistol produces significantly higher sound pressure levels (7-18dB) than a comparable .22 caliber pistol, regardless of ammunition. Use of hearing protection is required for shooter. Closest athletes and potentially some spectators are at risk according to current NIOSH and WHO sound exposure guidelines. Using a Starter Pistol, which generates 166dB at 0.5m, the shooter will have to be 256 meters(!!) or ~280 yards away from the athletes to adhere to Electronic Starter requirements. Starter Pistols and/or Blanks are used for high school, university...
Bruit excessif, la CLP s'en remet à la définition du terme «excessif» que donne le dictionnaire
Le travailleur doit donc démontrer, non pas une exposition à un bruit important ou significatif, mais plutôt une exposition à un bruit «qui dépasse la mesure souhaitable ou permise, qui est trop grand, trop important». La présomption de maladie professionnelle s'applique puisque le travailleur a une atteinte auditive causée par le bruit et qu'il a été exposé à des bruits excessifs dans le cadre de son travail de mécanicien-assembleur de moteurs d'avions. Certaines mesures réalisées...
Stress and difficulty communicating in the chemotherapy clinic
This study measured the noise levels in the Portland Veteran's Affairs Medical Center's outpatient chemotherapy clinic. Patients, visitors, and staff members filled out anonymous surveys regarding their reactions to noise levels. Noise measurement analysis indicated that levels were at or above 70 dB SPL for less than ten minutes during the 11-hour recording window. The patient and visitor surveys indicated that both groups were unbothered by noise in the clinic. However, most staff members were bothered by or concerned about noise levels, and many felt that it caused stress and difficulty...
ADM Noise Exposure Calculator
The ADM noise exposure calculator helps identifying hotspots of noise exposure at work, at the discotheque and by use of an MP3 player. The ADM noise exposure calculator has been produced and is maintained by the IFA – Institute for Occupational Safety and Health of the German Social Accident Insurance Source : http://www.dguv.de/ifa/en/pra/softwa/laermbelastungsrechner/index.jsp
Le niveau vibratoire et sonore des équipements miniers n'est pas considéré lorsque vient le temps de choisir le matériel
Dans cette étude, plusieurs recommandations visant à réduire l’exposition des travailleurs miniers au bruit et aux vibrations sont formulées. Un total de 28 équipements miniers répartis dans 8 mines souterraines québécoises a été évalué. Pour les vibrations globales du corps, les équipements à risque élevé (pour une exposition quotidienne de 8 heures) sont les rétrocaveuses (sur rails et sur roues), l’opération d’une foreuse à béquille sur...
The noise exposure of working divers – Diving information sheet No 14
This sheet discusses noise in relation to diving activities in general and divers' exposure to noise underwater in particular. This diving information sheet is part of a series of information sheets providing guidance on diving at work. It provides information on the levels of noise that commercial divers are exposed to as well as guidance on the responsibilities of diving contractors with respect to the Control of Noise at Work Regulations 2005 (CoNWR05).1 This sheet discusses noise in relation to diving activities in general and divers' exposure to noise underwater in particular. More...
State of the Art in Hearing Protection Research is Addressed by NIOSH Scientists in Special Journal Issue
Leading experts from the National Institute for Occupational Safety and Health (NIOSH) contribute to this month's special issue of the peer-reviewed journal Noise and Health on state-of-the-art research on hearing protection devices. The March-April issue of Noise and Health is available online at www.noiseandhealth.org . The articles present latest findings in areas where new research is vital for addressing challenges that practitioners, employers, and workers can face in choosing and using proper hearing protection. These include: •Proper fit testing of hearing protectors. •Determining...
Évaluer et mesurer l'exposition professionnelle au bruit
Ce guide est un document de référence pour évaluer et mesurer le risque lié à l'exposition au bruit au travail. Il a été rédigé à l'intention des techniciens chargés d'évaluer le risque lié au bruit professionnel, au sein des entreprises bruyantes, dans les services de médecine du travail, dans les sociétés de service en acoustique industrielle. L'évaluation du risque y est traitée en référence à la réglementation, qui définit...
NIOSH Develops New Software to Analyze and Reduce Noise Exposure
National Institute for Occupational Safety and Health (NIOSH) has been performing research to analyze and reduce hazardous noise exposure in mines. http://www.cdc.gov/niosh/mining/pubs/pdfs/2009-150.pdf
The Noise of Music
This Guidance is intended to provide practical guidelines to help workers and employers in the music and entertainment sectors to protect their hearing and meet their legal obligations. http://publications.hsa.ie/getFile.asp?FC_ID=606&docID=322

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