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Document ID (ISN)63138
CIS number 94-1718
ISSN - Serial title 0007-9952 - Cahiers de notes documentaires - Hygiène et sécurité du travail
Year 1993
Convention or series no.
Author(s) Casali J.G., Park M.Y.
Title Laboratory versus field attenuation of selected hearing protectors
Original title Comparaison de l'affaiblissement obtenu en laboratoire et sur le terrain avec différents protecteurs auditifs [in French]
Bibliographic information 2nd Quarter 1993, No.151, Note No.1927-151-93, p.293-303. 20 ref.
Abstract Two studies, each using 40 subjects and 4 hearing protection devices (HPDs), of which 3 were common to both studies, were conducted to determine real-ear spectral noise attenuation in a controlled laboratory environment and in industrial field settings. On average, the laboratory attenuation results obtained after the subject underwent the work activity tasks overestimated the field performance by 8.3dB (under the subject-fit) and 5.7dB (under the trained-fit) for the foam plug, and by 10dB and 6dB, respectively, for the premoulded plug. In contrast, the laboratory results provided much better predictions of field protection for the earmuff. Close examination of the data suggests that a naive subject-fit protocol in the laboratory may yield attenuation results closest to those of well-trained users in the field. Translation of an article that appeared originally in Sound and Vibration, 1991, Vol.25, No.10, p.28-38.
Descriptors (primary) hearing protection; human experiments; sound attenuation; evaluation of equipment
Descriptors (secondary) earplugs; earmuffs; comparative study; translation; field tests
Document type D - Periodical articles
Country / State or ProvinceUSA
Subject(s) Noise, hearing and vibration
Broad subject area(s) Physical hazards
Browse category(ies) Noise
Hearing protection