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Document ID (ISN)57345
CIS number 92-281
ISSN - Serial title Cahiers de notes documentaires - Sécurité et hygiène du travail
Year 1991
Convention or series no.
Author(s) Campo P., Damongeot A.
Title Is the "A" weighting a relevant indicator of the harmfulness of low frequency noise? A review
Original title La pondération "A" est-elle un indicateur pertinent de la nocivité des bruits de basses fréquences? Etude bibliographique [in French]
Bibliographic information 3rd Quarter 1991, No.144, Note No.1843-144-91, p.485-492. Illus. 40 ref.
Abstract Originally, the "A" weighting filter found in sound level meters was a frequency filter made for measuring the "loudness" of low intensity sounds having different frequency spectra. Later on, when applied to noise-induced temporary threshold shift, it appeared that the "A" weighting could also be used for assessing the auditory risk due to exposure to high level noise, with different spectral compositions. Recent physiological studies show that, at a given "A" weighted sound level, low frequency noises produce higher hearing losses than medium or high frequency noises. Thus, the "A" weighting would tend to underestimate the harmfulness of low frequency noise. However, epidemiologic surveys appear necessary to confirm this assumption.
Descriptors (primary) measurement and investigation; noise; noise measurement; hearing level; low-frequency noise
Descriptors (secondary) literature survey
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