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Document ID (ISN)101921
CIS number 03-855
ISSN - Serial title 0003-4878 - Annals of Occupational Hygiene
Year 2002
Convention or series no.
Author(s) Toivonen M., Pääkkönen R., Savolainen S., Lehtomäki K.
Title Noise attenuation and proper insertion of earplugs into ear canals
Bibliographic information Aug. 2002, Vol.46, No.6, p.527-530. Illus. 8 ref.
Abstract To determine whether noise attenuation can be improved by informing workers on the proper insertion of earplugs, 54 randomly-selected male subjects were divided into two groups: an untrained group (25 persons) and a group who had received training (29 persons). The trained group was provided with information on earplug insertion and allowed to practice the insertion procedure, whereas the untrained group acted as controls. The success of the training was measured by the MIRE (microphone in real ear) and REAT (real ear at threshold) methods, visual evaluation and an inspection of the subjects' ear canals. According to the MIRE method, average noise attenuation was 21dB for the untrained group and 31dB for the trained group. With the REAT method, attenuation at 1000Hz was 24dB for the untrained group and 30dB for the trained group. The visual evaluation of the earplug fit was 1.9 for the untrained group and 2.6 for the trained group (scales 0-3).
Descriptors (primary) noise; safety training in industry; earplugs; sound attenuation
Descriptors (secondary) male workers; audiometric tests; programme evaluation; case-control study
Document type D - Periodical articles
Country / State or ProvinceFinland
Subject(s) Noise, hearing and vibration
Broad subject area(s) Physical hazards
Browse category(ies) OSH training
Hearing protection