ILO Home
Go to the home page
Site map | Contact us Français | Español

CISDOC database

Document ID (ISN)111174
CIS number 10-0708
ISSN - Serial title 0007-9952 - Cahiers de notes documentaires - Hygiène et sécurité du travail
Year 2010
Convention or series no. ND 2334-220-10
Author(s) Kusy A.
Title Evaluating the in-situ acoustic attenuation of custom-moulded earplugs
Original title Evaluation de l'affaiblissement acoustique réel in situ des bouchons moulés individualisés [in French]
Bibliographic information 3rd quarter 2010, No.220, p.35-42. Illus. 19 ref.
Internet access ND_2334-220-10.pdf [in French]
Abstract The aim of this study was to compare the noise attenuation values of custom-moulded earplugs declared by suppliers with the values obtained in field measurements, taken from 63 workers of nine sites of various industrial sectors. Findings confirm the overestimation of manufacturer-declared acoustic attenuation values compared to in-situ measurements, ranging from 3 to 5dB for high frequencies to 8 to 10dB for medium and low frequencies. These results confirm that custom-moulded earplugs are relatively inefficient in attenuating low frequencies.
Descriptors (primary) noise level measurement; sound absorption; sound attenuation; earplugs
Descriptors (secondary) labelling; personal sampling; equipment testing; comment on standard
Document type D - Periodical articles
Subject(s) Noise, hearing and vibration
Broad subject area(s) Physical hazards
Browse category(ies) Noise