|Document ID (ISN)||61138|
|ISSN - Serial title
||0002-8894 - American Industrial Hygiene Association Journal
|Convention or series no.
||Dolan T.G., Maurer J.F., Dickinson L.G.
||Evaluation of an earphone-support device for measuring earplug attenuation
||Feb. 1993, Vol.54, No.2, p.45-50. Illus. 15 ref.
||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.
||hearing protection; earplugs; sound attenuation; noise control
||earphones; audiometric tests; evaluation of technique
||D - Periodical articles
|Country / State or Province||USA|
||Noise, hearing and vibration
|Broad subject area(s)