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Document ID (ISN)68426
CIS number 97-265
ISSN - Serial title 0007-9952 - Cahiers de notes documentaires - Hygiène et sécurité du travail
Year 1996
Convention or series no.
Author(s) Damongeot A., Didry G., Kusy A.
Title Psychoacoustic method for the measurement of sound levels emitted by earphones. Application to so-called "communication" hearing protectors
Original title Méthode psychoacoustique de mesure du niveau sonore émis par les écouteurs. Application aux protecteurs de l'ouïe dits "de communication" [in French]
Bibliographic information 4th Quarter 1996, No.165, Note No.2034-165-96, p.481-489. Illus. 16 ref.
Internet access [in French]
Abstract Calculating the sound levels to which wearers of communication hearing protectors are exposed to requires knowledge of the electroacoustic emission characteristics of the earphones (relation between emitted sound level and supply voltage). The psychoacoustic method described is used to determine these characteristics. It consists in asking test subjects to equalize the intensities of test sounds emitted alternately by the earphone and by a loudspeaker, making the latter easier to measure. Measurements were made with 10 test subjects and 3 types of earphone. Good reproducibility was achieved (deviations not exceeding 2dB for the same subject and the same earphone position). The inter-individual dispersion was wider, with standard deviations as high as 4.7dB, reflecting morphological differences in the subjects and differences in the fit of the earphones. This method could constitute a reference method for validating faster measurement techniques such as the "MIRE" technique (Microphone in the Real Ear) or the "HATS" technique (Head and Torso Simulators) currently being developed.
Descriptors (primary) hearing protection; noise level measurement; earphones; noise
Descriptors (secondary) description of technique
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