|Document ID (ISN)||106319|
|ISSN - Serial title
||0007-9952 - Cahiers de notes documentaires - Hygiène et sécurité du travail
|Convention or series no.
||INRS ND 2250-203-06
||Exposure limits to infrasounds and ultrasounds - Literature survey
||Limites d'exposition aux infrasons et aux ultrasons - Etude bibliographique [in French]|
||June 2006, No.203, p.67-77. Illus. 42 ref.
||http://www.inrs.fr/INRS-PUB/inrs01.nsf/inrs01_catalog_view_view/4F075B368A2B84BBC125719D0038C4E3/$FILE/nd2250.pdf [in French]
||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.
||infrasound; health hazards; noise; ultrasound
||sound intensity; literature survey; sound propagation; hearing loss; sound transmission; hearing threshold; burns; noise measurement; permissible levels
||D - Periodical articles
|Country / State or Province||France|
||Noise, hearing and vibration
|Broad subject area(s)