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NF EN ISO 7029 - 2017 - Acoustique
Distribution statistique des seuils d'audition en fonction de l'âge et du sexe Le présent document fournit des données statistiques descriptives concernant le seuil d'audition de groupes de sujets otologiquement normaux d'âges divers dans des conditions d'écoute monoaurale à l'aide d'écouteurs. Il spécifie les informations suivantes, pour des populations dont l'âge est compris entre 18 ans et 80 ans inclus et pour la gamme de fréquences audiométriques de 125 Hz à 8 000 Hz : la valeur...
Whole body vibration exposures in bus drivers: A comparison between a high-floor coach and a low-floor city bus
Low back pain (LBP) is common in occupational bus drivers and studies have shown a dose–response relationship between whole body vibration (WBV) exposure and LBP. Bus design may be an important factor in determining the WBV exposure a bus driver receives. The purpose of this study was to determine whether differences exist in WBV exposures between two buses commonly used in long urban commuter routes: a high-floor coach and a low-floor city bus. Each bus was driven over a standardized test route which included four road types: a newer smooth freeway, a rougher old freeway, a city street segment...
The effectiveness of BS EN ISO 28927-9:2009 concerning the vibration emission of scaling hammers and needle scalers
The work in this report provides HSE with information regarding: the likelihood that use of a tool's vibration emission value will result in minimised vibration exposures for the end user; and the limitations of the declared vibration emission value measured according to the standard test code, for use in a vibration exposure assessment. Source : http://www.hse.gov.uk/research/rrpdf/rr967.pdf
How far do you speak in the office?
Should we just accept that it takes 20 metres for the sound level of someone's voice to drop to a comfortable non-distracting level, or should we reduce this to 10 metres so that workgroup-to-workgroup distractions are minimized? Source : http://www.acousticbulletin.com/EN/2013/04/how_far_do_you_speak_in_the_of.html
Whole body- vibration (WBV) levels remained just above ISO 2631-1 after being optimized for load-haul-dump (LHD) vehicles
Operators of load-haul-dump (LHD) vehicles are commonly exposed to wholebody- vibration (WBV) levels above ISO 2631-1 and EU Directive 2002/44/EC guidelines. Vibration exposure was lowest when the LHD was driven at the lowest speed, forward, over smooth terrain, with ride control on and the bucket loaded (0.20 m/s 2 ). The A(8) decreased from 0.84 m/s 2 when driving with ride control off, over mixed terrain using all gears, to 0.53 m/s 2 when driving with ride control on and an optimized seat. The estimated daily exposure decreased but remained just above the ISO 2631-1 and EU Directive 2002/44...
Some of the tested gloves meet the vibration transmissibility criteria specified in the current standard (ISO 10819,1996) but none of them could be classified as an AV glove
To improve the reliability of the anti-vibration (AV) glove test defined in the current standard, a revised version of the standard has been proposed. This study examined the rationale behind the major revisions of the standard and evaluated the major technical aspects of the revised method through an experiment. To help evaluate the AV glove criteria, the effects of the glove on the grip strength were also examined. The glove vibration transmissibility values were measured with a new spectrum proposed in the current study. The results suggests the new spectrum can greatly simplify the test without...
The Zwicker loudness calculation method, soon deleted from ISO standardization
A widely used metric, the Zwicker loudness calculation method, is currently being deleted from ISO standardization to be replaced with a new method. The Moore & Glasberg method behaves differently than Zwicker method with different signal bandwidths. National technical advisory group representatives to ISO TC43 will present each country's voting position. This issue is very important; there is a possibility of a significant shift in the use and industrial usefulness of psychoacoustic metrics. No «translation formula» may be applied universally to a result calculated with one...
Hand-arm vibration of horticultural machinery Part 2
The work described in this report assesses the standard test for hedge trimmers defined in BS EN ISO 10517:2009 for repeatability and ease of use and where possible for reproducibility (by comparing machine manufacturers’ declared vibration against HSL measurements to the same standardised procedures). It also assesses the validity of the measurement techniques adopted in the vibration emission test, investigates some of the factors which are likely to influence the results of the test and compares the vibration emission values with vibration magnitudes measured under real operating conditions...
Hand-arm vibration of horticultural machinery: Part 1
In recent years there have been many cases of HAVS being reported for people who work in agriculture, horticulture and landscape gardening. HSE/HSL does not currently hold much information on vibration exposures in these areas of work. The work described in this research report assesses the standard test defined in BS EN 836:1997 (incorporating amendments Nos. 1 to 3) for repeatability and ease of use and where possible for reproducibility (by comparing machine manufacturers' declared vibration against HSL measurements to the same standardised procedures). Source : http://www.hse.gov.uk/research...
Manufacturers’ data can seriously underestimate the risks associated with use of electric hammers.
The HSL interpretation of the application of the test code has resulted in emission values that better indicate the vibration risk . Comparing the HSL measured emission data with the vibration magnitudes measured at HSL during typical use showed a reasonable level of agreement. The HSL interpretation of the application of the test code has resulted in emission values that reach or exceed the upper quartile of HSL field magnitudes in most cases. However, the large differences between HSL measured emission values and those determined by manufacturers have not been explained and suggest differences...
Evaluation des risques pour l'audition des opérateurs des centres d'appels téléphoniques et solutions de prévention
L'évaluation des risques pour l'audition des opérateurs des centres d'appels téléphoniques a nécessité le développement d'une nouvelle méthodologie utilisant un appareillage de mesure spécifique conforme à la norme ISO 11904-2 parue en 2005. Cet appareillage, basé sur un simulateur de tête et torse et d'un simulateur d'oreille occluse, a été déployé par l'INRS dans 21 centres d'appels pour estimer le risque auditif de plus d'une centaine d'opérateurs...
Détermination des niveaux de puissance acoustique émis par les sources de bruit à partir de la pression acoustique
Méthodes de laboratoire en salles réverbérantes La présente Norme internationale spécifie une méthode directe et une méthode de comparaison pour déterminer le niveau de puissance acoustique qui serait produit par une source fonctionnant dans les conditions météorologiques normalisées correspondant à une impédance caractéristique rc = 400 N.s/m3 (r étant la densité de l'air et c la vitesse du son). Elle définit des prescriptions concernant la salle d'essai et l'emplacement...
Détermination de l'exposition au bruit en milieu de travail
La présente Norme internationale spécifie une méthode d'expertise permettant de mesurer l'exposition au bruit des travailleurs dans un environnement de travail et de calculer le niveau d'exposition au bruit. Elle traite des niveaux pondérés A, mais est également applicable aux niveaux pondérés C. Trois stratégies de mesurage différentes sont spécifiées. La méthode est utile lorsque l'exposition au bruit doit être déterminée avec une classe d'expertise, par exemple pour...

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