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This paper reports the quantitative effect of leakage on the noise attenuation of earmuff hearing protectors. The technology used in this study to measure the noise leakage is considered to be a new contribution to this topic. An array of sensors placed between an earmuff and a dummy human head or flat surface was used to measure the contact area. Areas of no contact are considered as the leakage elements. Eight earmuffs varying from high quality/high cost to low quality/low cost were tested, the leakage areas were measured and the reduction in the noise attenuation due to leakage was calculated.
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Tom
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109--115
Opis fizyczny
Bibliogr. 16 poz., rys., tab., wykr., fot.
Twórcy
autor
- Federal University of Santa Catarina (UFSC)/EMC, Florianopolis, SC, Brazil
- NR Consultancy and Training, Laboratory for Individual Protection Equipment’s (LAEPI), Florianopolis, SC, Brazil
- Institute Federal de Santa Catarina (IFSC)/Mecatronics, Florianopolis, SC, Brazil
autor
- NR Consultancy and Training, Laboratory for Individual Protection Equipment’s (LAEPI), Florianopolis, SC, Brazil
autor
- Institute Federal de Santa Catarina (IFSC)/Mecatronics, Florianopolis, SC, Brazil
Bibliografia
- 1. ANSI S3.36 (1985), Specification for a manikin for simulated in situ airborne acoustic measurements.
- 2. ANSI S12.6 (2008), Methods for Measuring the Real-Ear Attenuation of Hearing Protectors.
- 3. Arezes P.M. (1998), Analise do conforto e eficiˆencia de protetores individuais auditivosno meio industrial, Master’s thesis in human engineering, Minho University, Portugal.
- 4. Arezes P.M., Miguel A.S. (2002), Hearing protector acceptability in noisy environments, Ann. Occup. Hyg., 46, 6, 531–6.
- 5. Berger E.H., Franks J.R. (2011), Hearing Protection, [in:] 31. Personal Protection, Herrick R.F. [Ed.], Encyclopedia of Occupational Health and Safety, Jeanne Mager Stellman, Editor-in-Chief, International Labor Organization, Geneva. S.N.Y. Gerges, R.N.C. Gerges, R.A. Dias – Earmuff Noise Leakage Measurements and Evaluation 115
- 6. Berger E.H., Royster L.H., Royster J.D., Driscoll D.P., Layne M. (2000), The Noise manual, American Industrial Hygiene Association, p. 395.
- 7. Gerges S.N.Y. (2012), Earmuff comfort, Applied Acoustics, 73, 1003–1012.
- 8. Gerges R.N.C. (2013), Classified report for hearing protector manufacturer. Comparison between six types of cushions of one brand of earmuff from the contact pressure distribution for comfort and leakage.
- 9. Gerges S.N.Y., Sanches D., Gerges R.N.C. (2010), Earmuff Comfort, ICA 2010, Sydney, Australia.
- 10. Gerges R.N.C., Gerges S.N.Y. (2014), Earmuff comfort evaluation, International Congress of Noise Control Engineering – Internoise 2014, Melbourne, The Australia Acoustical Society 2014.
- 11. Hsu Y.-L., Huang C., Yo C., Chen C., Lien C. (2004), Comfort evaluation of hearing protection, Int. J. Ind. Ergon., 33, 543–551.
- 12. Paurobally M.R., Pan J. (2000), The mechanisms of passive ear defenders, Applied Acoustics, 60, 293–311.
- 13. Reynolds D.D. (1981), Engineering Principles of Acoustics, Noise and Vibration Control, Allyn and Bacon.
- 14. Shaw E.A.G., Thiessen G.J. (1958), Improved cushion for ear defenders, Journal of the Acoustical Society of America, 30, 1, 24–36.
- 15. Williams W. (2007), Clamping pressure and circumaural earmuffs, Noise Health, 9, 35, 45–50.
- 16. Zannin P.H.T., Gerges S.N.Y. (2006), Effects of cup, cushion, headband force, and foam lining on the attenuation of an earmuff, International Journal of Industrial Ergonomics, 36, 2, 165–170.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-8747c4eb-3c2f-4c28-a858-bd70c787ae24