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Use of moulded hearing protectors by child care workers
An interventional pilot study Background: Employees of a multi-site institution for children and adolescents started to wear moulded hearing protectors (MHPs) during working hours, as they were suffering from a high level of noise exposure. It was agreed with the institutional physician and the German Institution for Statutory Accident Insurance and Prevention in the Health and Welfare Services (BGW) that this presented an opportunity to perform a scientific study to investigate potential beneficial effects on risk of burnout and subjective noise exposure at work when child care workers wear MHPs...
Développement d’outils et de méthodes pour mieux évaluer et améliorer la protection auditive individuelle des travailleurs
Lorsque l'élimination à la source ne peut être envisagée, la protection individuelle demeure la solution la plus utilisée pour protéger les travailleurs exposés à des niveaux de bruit importants en raison de sa facilité et de sa rapidité d'implantation, ainsi que de son faible coût économique. Le port des protecteurs auditifs est néanmoins associé à plusieurs problématiques : (i) ils peuvent être un cofacteur de risque pour les accidents du travail, (ii) leur performance réelle...
Assessment of subjective and objective measurement systems of earplug attenuation on an individual - RR975
Systems that measure earplug attenuation for individual wearers are commercially available and the work detailed in this report aimed to assess the performance and test the reliability of two types of available system: objective measurement and subjective equal loudness. Systems were chosen to represent a type of system rather than a specific model of device and because they: were commercially available through leading manufacturers; were designed for use by operators with a minimal level of training or expertise; could be used with a range of earplugs; and were typical of the state of the art...
NIOSH HPD Well-Fit™: The Future is Fit-Testing
For workers and others who are exposed to dangerously loud noises which cannot be reduced or eliminated, hearing protection devices (HPDs) are absolutely necessary to save their hearing. But if HPDs are not properly selected or correctly worn, the devices may not block out enough noise and the wearer may still risk a loss of hearing. How can a person tell if their HPDs are fit correctly? A new development from NIOSH – HPD Well-FitTM – can quickly and inexpensively test the performance of hearing protection. This fit testing technology is a huge advancement in efforts to save workers'...
Valeurs limites d'exposition au bruit et port de protecteurs individuels (ED 133)
La protection acoustique réellement procurée par les protecteurs individuels contre le bruit (serre-tête antibruit, bouchons d'oreille...) est généralement inférieure à celle annoncée par les fabricants. Cette publication propose une méthode et des outils pour estimer le niveau sonore réellement subi par les salariés lorsqu'ils portent des protections antibruit. Source :
Quand et comment avoir recours à un double protecteur auditif ?
Réponse de l'INRS à la question suivante : À partir de quel niveau de bruit d'exposition peut-on conseiller le port d'un double protecteur auditif ? Comment peut-on estimer l'efficacité d'une double protection ? Comment en déduire le niveau de bruit résiduel sous le protecteur pour le comparer aux valeurs limites d'exposition ? A. Kusy Source : DMT assistance dans Documents pour le médecin du travail , no 125, 1er trimestre 2011, p. 141-142.
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 . 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...
Certifying Personal Protective Technologies
Conformity assessment is key to ensuring that the products we purchase are effective and perform to specifications; as users we are not expected to know or be engaged in the actual intricacies of how products are tested and verified to make sure that they meet performance requirements. This report focuses on conformity assessment for occupational personal protective technologies (PPT)—ensuring that PPT are effective in preventing or reducing hazardous exposures or situations that workers face in their jobs. Because respirators already have an extensive testing and conformity assessment process...
Transmission sonore à travers les protecteurs auditifs et application d'une méthode pour évaluer leur efficacité en milieu de travail
La réduction du bruit à la source est la solution à privilégier pour combattre les effets du bruit en milieu de travail. Malgré tout, de par sa simplicité à mettre en oeuvre à par son apparent faible coût, l'utilisation de protecteurs auditifs demeure très populaire. Il devient donc important de bien connaître l'efficacité réelle des protecteurs utilisés en milieu de travail afin de faire des choix judicieux et éclairés. Cependant, de nombreuses études au cours des vingt...
Is it necessary to measure Hearing Protectors Attenuation at 4 and 8 khz ?
A Microphone In Real Ear (MIRE) technique specifically designed to measure Hearing Protection Device (HPD) attenuation in the field has been recently made available on a large scale. Some detailed studies of such measurement system, often referred to as “Field-MIRE” or “F-MIRE” systems, have also made clear that the measurement attenuation for the high frequencies (typically in the 2, 4 and 8 kHz Octave Bands) could become surprisingly variable over time, for a same fit of an HPD on a human subject. After thorough investigation, and because the measurement system itself...
5 hearing protection myths
Most hearing conservation programs rely on hearing protection devices (HPDs) to reduce workers' exposure to hazardous noise and other loud sounds and to prevent noise-induced hearing loss (NIHL). Other methods of reducing noise exposure, such as engineering and administrative controls, are used less often due to enforcement policies that allow hearing protectors to be used as a substitute for noise controls and because of concerns about the effectiveness and feasibility of noise controls in the workplace. Source :
Real world use and performance of hearing protection
This report considers the effectiveness of hearing protectors in everyday work situations. The study reported here was undertaken in two parts. The first consisted of interviews with employers to discuss management of noise and hearing protector use, and on site observation of hearing protector use. The second part was objective laboratory measurements of hearing protector insertion loss. The purpose of these measurements was to quantify the reduction in protection due to poor fitting or maintenance for a range of hearing protectors. Earmuffs were tested using the MIRE (microphone in real ear)...
Music festivals and outdoor events
Staff at a major music festival were exposed to very high noise levels without adequate care for their safety. This was a large music festival with more than 50,000 people present and with two major outdoor stages.

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