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Comment étudier l'effet d'un protecteur auditif sur l'audibilité des signaux avertisseurs de danger?
Le port de protecteurs auditifs (bouchons d'oreilles, casques anti-bruit) est susceptible de nuire à la perception des signaux sonores indicateurs de danger, comme l'alarme de recul d'un chariot élévateur. Dans le cadre d'un partenariat entre l'INRS et la SNCF, l'effet du port de protecteurs a été évalué à partir de signaux sonores caractéristiques des trois principaux métiers du secteur ferroviaire. Source: Arz, J.-P. Hygiène et sécurité du travail , No 243, Juin 2016, p. 64-69. http...
Modeling acoustic propagation in a compartment fire
Firefighters unable to move and in need of rescue use an audible alarm to signal for help. Rescue teams can then follow this sound to the firefighter. This alarm is governed by NFPA 1982 : Standard on Personal Alert Safety System (PASS). Introduced in 1983, the PASS has saved many firefighter lives. However, a number of incidents have occurred where the PASS is less effective. There have been incidents where the PASS was heard sporadically on the fireground, or where localization of the alarm was difficult, leading to injury and loss of life. We hypothesized that the temperature field created by...
The effect of firefighter personal protective equipment on auditory thresholds
Communication on a fire scene is essential to the safety of firefighters. Not only to be able to hear and understand radio chatter, but also alarm signals used on the fireground. One such alarm is the Personal Alert Safety System (PASS) device. This device is used to help locate a downed firefighter. One part of this complex problem is the effect of the protective equipment (helmet, eye protection, hood, coat) on hearing. Previous findings have shown the effect of this protective equipment on head related transfer functions using a KEMAR. [Suits et al. (2013, June). Paper presented at the International...
Noise and communication: A three-year update
Noise is omnipresent and impacts us all in many aspects of daily living. Noise can interfere with communication not only in industrial workplaces, but also in other work settings (e.g. open-plan offices, construction, and mining) and within buildings (e.g. residences, arenas, and schools). The interference of noise with communication can have significant social consequences, especially for persons with hearing loss, and may compromise safety (e.g. failure to perceive auditory warning signals), influence worker productivity and learning in children, affect health (e.g. vocal pathology, noise-induced...
Sécurité des travailleurs derrière les véhicules lourds - Évaluation de trois types d'alarmes sonores de recul
Plusieurs accidents graves impliquant des véhicules en marche arrière sont enregistrés chaque année. Il est donc primordial d’assurer la conception optimale des signaux avertisseurs de recul afin d’alerter les travailleurs et de les aider à localiser le véhicule en marche arrière, tout en limitant la gêne due au bruit. Les avertisseurs sonores présentent un avantage sur les avertisseurs visuels puisqu’ils captent habituellement l’attention des individus. Toutefois, des accidents peuvent survenir dans des environnements...
Employers can take steps to reduce the risk of back over on worksites
Concerns are growing about the high number of deaths due to vehicles or equipment backing over workers. An OSHA standard for regulating backing operations does not exist, but employers can take proactive steps to reduce the hazard. “There is some fatigue associated with [backing alarms] in that you hear the same sound over and over again, and it starts to lose its meaning,” said Steve Hawkins, assistant administrator at the Tennessee Department of Labor and Workforce Development. Back-up alarms are not necessarily directional – workers on the ground may have no idea where the...
The bi-sound signal to be mandatory for track work (IFA): the perceptibility of the signals have been tested under working noise conditions
Warning signal generators are used at points where track work is being carried out in order to warn workers of approaching trains on neighbour-ing lines, electroacoustic signal generators are generally employed. Harmonization of the warning signals would simplify instruction at the work site. In addition, the signal generators fitted on track-laying machines would not repeatedly have to be set to whichever warning signal is emitted by the signalling devices on the track being worked on. In order to determine the perceptibility of the signals under working noise conditions, hearing tests were conducted...
Influence de la perte auditive et du port de protecteurs auditifs sur l'installation d'avertisseurs sonores en milieux de travail bruyants
Des avertisseurs sonores sont souvent nécessaires en milieu industriel pour informer promptement les ouvriers d'événements pouvant compromettre leur sécurité. Or, la perception d'avertisseurs sonores en milieu bruyant dépend de plusieurs facteurs dont le niveau sonore des signaux avertisseurs par rapport au bruit de fond, le port de protecteurs auditifs et le statut auditif des travailleurs. De plus, le choix du nombre de dispositifs avertisseurs à utiliser et de leurs emplacements sur les murs ou le plafond d'un local industriel dépend...

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