Laboratory objective method for noise reduction measurements of ear-muffs

• Autorzy: Kozłowski E. , Kotarbińska E.
• Konferencja: XIV International Conference Noise Control'07 (3-6.06.2007, Elbląg, Poland)
• Języki publikacji: EN

Abstrakty

EN

The aim of the project was to work out a laboratory method for measurements of noise reduction of ear-muffs whose results are in better agreement with real-world performance than the results of sound attenuation measurements according to PN-EN 24869-1. The paper presents the methodology for noise reduction measurements of ear-muffs with the use of a four-channel sound analyzer. The laboratory test site met the requirements of PN-EN 24869-1. The objective tests were carried on with sixteen persons. The microphones were placed at the subject's ear under the ear-muffs' cups and outside the cups. The measurements were carried on four samples of ten models of ear-muffs. The comparison of noise reduction measurements data with the sound attenuation measured according to PN-EN 24869-1 is discussed.

Słowa kluczowe

EN

hearing protectors; earmuffs; noise reduction

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2007
• Tom: Vol. 32, No. 2
• Strony: 287--292
• Opis fizyczny: Bibliogr. 6 poz., rys., tab.

Twórcy

autor

Kozłowski E.

autor

Kotarbińska E.

• Central Institute for Labour Protection - National Research Institute, Czerniakowska 16, 00-701 Warszawa, Poland,

Bibliografia

• [1] BERGER E., The Noise Manual, pp. 421.422. BERGER E. H., ROYESTER L. H., ROYESTER J. D., DRISCOLL D. P., LAYNE M. [Eds.], AIHA Press, American Industrial Hygiene Association, 2000.
• [2] LIEDTKE M., Standardised testing of hearing protectors and their effectiveness in the conditions of use, Proceedings of Conference on Research and standardization in the field of development and use of personal protective equipment, pp. 239.247, Kraków 2005.
• [3] KOTARBIŃSKA E., KOZŁOWSKI E., Report on Investigations of exposure to noise of workers waering hearing protectors, Central Institute for Labour Protection . National Research Institute, Warszawa 2006.
• [4] Standard EN 458 Hearing protectors . recommendations for selection, use, care and maintenance . Guidance, European Committee for Standardization, Brussels 2004.
• [5] Standard EN 24869-1 Acoustics . Hearing protectors . Part 1: Subjective methods for the measurements of sound attenuation, European Committee for Standardization, Brussels 1992.
• [6] Standard EN ISO 4869-2 Acoustics . Hearing Protectors . Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn, European Committee for Standardization, Brussels 1995.