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Wyświetlanie 1-2 z 2
Tytuł:
Measurement of Effective Noise Exposure of Workers Wearing Ear-Muffs
Autorzy:
Kotarbińska, E.
Kozłowski, E.
Powiązania:
https://bibliotekanauki.pl/articles/90912.pdf
Data publikacji:
2009
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
noise exposure
hearing protectors
earmuffs
real-world attenuation
Opis:
This paper presents the methodology and the results of binaural measurements of exposure to noise for 91 industry workers wearing ear-muffs. The results revealed that 18.7% of the workers were exposed to noise of equivalent A-weighted sound pressure levels of over 80 dB(A) and 7.7% to levels of over 85 dB(A). The measured levels were compared with those calculated with the octave-band method according to Standard No. EN 458:2004. The differences ranged from – 3 dB(A) to 26.5 dB(A); their statistical distribution did not indicate any data which could suggest derating laboratory measurements. The main causes of exposure to noise higher by over 3 dB(A) than that theoretically predicted were the bad technical condition of ear-muffs (32.2% of the cases) and an incorrect way of wearing them (15.2%).
Źródło:
International Journal of Occupational Safety and Ergonomics; 2009, 15, 2; 193-200
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hearing Protectors: Topicality and Research Needs
Autorzy:
Canetto, P.
Powiązania:
https://bibliotekanauki.pl/articles/89860.pdf
Data publikacji:
2009
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
occupational noise
hearing protectors
human behaviour
attenuation
real world
derating
subject-fit
comfort
research
Opis:
Occupational noise specialists do not generally recommend hearing protection devices (HPDs) as a preferred solution to noise risk prevention. Nevertheless, these devices are widely used and are in fact often necessary. Selection of an HPD should take into account comfort and the capacity for perceiving external signals, when they are worn. Current European regulations require that HPD attenuation be considered, when comparing noise exposure to limit values. However, HPD attenuation is effectively unknown under real-world conditions. Some methods are designed to give approximate attenuation values and these provide results within a wide statistical range. Field measurement methods and current standards have been developed to deal with this situation. The specific characteristic of impulse noise requires establishment of dedicated criteria and tools for HPD selection and testing. This paper introduces a number of avenues for research, which could be of assistance in improving HPD selection, qualification and design.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2009, 15, 2; 141-153
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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