ILO Home
Go to the home page
Site map | Contact us Franšais | Espa˝ol

CISDOC database

Document ID (ISN)67085
CIS number 96-1462
ISSN - Serial title 0002-8894 - American Industrial Hygiene Association Journal
Year 1996
Convention or series no.
Author(s) Giardino D.A., Durkt G.
Title Evaluation of muff-type hearing protectors as used in a working environment
Bibliographic information Mar. 1996, Vol.57, No.3, p.264-271. Illus. 18 ref.
Abstract Noise reduction measurements were carried out for 23 models of muff-type hearing protection devices (HPDs) and 545 machines in a mining environment. The measured effectiveness was compared with the performance predicted by the Environmental Protection Agency Noise Reduction Rating (NRR) method, based on laboratory-derived attenuation values. The field performance was significantly less than that predicted by the NRR method. It was concluded that the NRR method grossly overestimates HPD performance. Use of this laboratory-based technique to predict field performance of HPDs could result in an overestimation of the protection afforded the worker.
Descriptors (primary) hearing protection; mining industry; sound attenuation; evaluation of equipment
Descriptors (secondary) evaluation of technique; prediction; field tests; earmuffs
Document type D - Periodical articles
Country / State or ProvinceUSA
Subject(s) Personal protection
Broad subject area(s) Physical hazards
Browse category(ies) Hearing protection
Mining and quarrying
Noise