|Document ID (ISN)||63138|
|ISSN - Serial title
||0007-9952 - Cahiers de notes documentaires - Hygiène et sécurité du travail
|Convention or series no.
||Casali J.G., Park M.Y.
||Laboratory versus field attenuation of selected hearing protectors
||Comparaison de l'affaiblissement obtenu en laboratoire et sur le terrain avec différents protecteurs auditifs [in French]|
||2nd Quarter 1993, No.151, Note No.1927-151-93, p.293-303. 20 ref.
||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.
||hearing protection; human experiments; sound attenuation; evaluation of equipment
||earplugs; earmuffs; comparative study; translation; field tests
||D - Periodical articles
|Country / State or Province||USA|
||Noise, hearing and vibration
|Broad subject area(s)