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Document ID (ISN)67711
CIS number 96-1856
ISSN - Serial title 0007-9952 - Cahiers de notes documentaires - Hygiène et sécurité du travail
Year 1996
Convention or series no.
Author(s) Kusy A., Damongeot A.
Title Measurement of the acoustic performances of ear plugs. Test using the MIRE technique
Original title Mesure des performances acoustiques des bouchons d'oreille - Essai d'application de la technique MIRE (Microphone in the real ear) [in French]
Bibliographic information 3rd Quarter 1996, No.164, Note No.2023-164-96, p.287-291. Illus. 7 ref.
Abstract The protection offered by some hearing protectors (ear muffs or ear plugs) of the non-linear or active types varies with the sound level. For the specific standardization of such hearing protectors, the need was felt to validate an objective method for assessing the noise attenuation afforded by a proven passive protector. The application of the MIRE (Microphone In Real Ear) technique, in which noise is measured by a miniature microphone placed in the ear canal, to the measurement of the acoustic performances of ear plugs of the user-moulded type is described. The noise attenuation measured using this technique was compared with the results obtained for the same protector using the subjective REAT (standardized hearing threshold displacement) method. There appears to be good agreement between the two methods, except at the 8kHz frequency. This discrepancy may be corrected by taking certain precautions in use.
Descriptors (primary) hearing protection; noise control; earmuffs; earplugs; sound attenuation
Descriptors (secondary) evaluation of equipment; description of equipment
Document type D - Periodical articles
Country / State or ProvinceFrance
Subject(s) Noise, hearing and vibration
Broad subject area(s) Physical hazards
Browse category(ies) Noise
Hearing protection