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Document ID (ISN)106319
CIS number 07-431
ISSN - Serial title 0007-9952 - Cahiers de notes documentaires - Hygiène et sécurité du travail
Year 2006
Convention or series no. INRS ND 2250-203-06
Author(s) Chatillon J.
Title Exposure limits to infrasounds and ultrasounds - Literature survey
Original title Limites d'exposition aux infrasons et aux ultrasons - Etude bibliographique [in French]
Bibliographic information June 2006, No.203, p.67-77. Illus. 42 ref.
Internet access$FILE/nd2250.pdf [in French]
Abstract Sound whose spectrum falls partly or wholly beyond the 20Hz to 20kHz range is traditionally termed inaudible. Yet, the sensitivity of the ear extends beyond this range, even though it is much weaker for both infrasound (low frequency) and ultrasound (high frequency). Moreover, humans can perceive both infrasound and ultrasound by other means than through the auditory path. In industrial settings, there are many sources that emit sounds whose spectra fall outside the audible range. There is evidence that, at sufficiently high levels, these virtually inaudible sounds may cause harmful or unpleasant effects. Based on a literature survey, this article examines infrasound and ultrasound transmission physics, human sensitivity to the related frequencies, the physiological effects noted during exposure to high levels and possible prevention measures. Exposure limit values adopted by several countries are discussed and, in the absence of French regulations, recommendations are proposed.
Descriptors (primary) infrasound; health hazards; noise; ultrasound
Descriptors (secondary) sound intensity; literature survey; sound propagation; hearing loss; sound transmission; hearing threshold; burns; noise measurement; permissible levels
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