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

CISDOC database

Document ID (ISN)61138
CIS number 93-2029
ISSN - Serial title 0002-8894 - American Industrial Hygiene Association Journal
Year 1993
Convention or series no.
Author(s) Dolan T.G., Maurer J.F., Dickinson L.G.
Title Evaluation of an earphone-support device for measuring earplug attenuation
Bibliographic information Feb. 1993, Vol.54, No.2, p.45-50. Illus. 15 ref.
Abstract A new procedure for determining the attenuation of earplugs with a standard audiometric headset was evaluated. The procedure utilised a device that supports a conventional supra-aural earphone cushion (MX-41/AR) such that it does not contact the pinna or the earplug during threshold measurement. The attenuation provided by a foam earplug was estimated on a group of normal-hearing subjects using this method. The resulting attenuation values were compared to data obtained using sound field methods (American National Standards Institute [ANSI] S12.6-1984), and to values obtained by simply placing the earphone on the pinna. Results indicated that the test re-test reliabilities of both the earphone-support method and the earphone-only method were comparable to that of the sound field procedure. Also, of the four test frequencies employed, the closest correspondence between attenuation estimates obtained using the ANSI procedures and estimates obtained with the support device occurred at 1 and 2kHz.
Descriptors (primary) hearing protection; earplugs; sound attenuation; noise control
Descriptors (secondary) earphones; audiometric tests; evaluation of technique
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