The temporary threshold shift of vibratory sensation induced by composite-band vibration exposure.
Eight healthy subjects were exposed to three 1/3 octave-band vibrations (63,200, and 500 Hz) by hand clasping a vibrated handle in a soundproof and thermoregulated room.
The vibratory sensation threshold at 125 Hz was measured before and after the vibration exposure at an exposed fingertip.
According to a preceding study, we first determined the relationship between the acceleration of the vibration and the temporary threshold shift of vibratory sensation immediately after the vibratory exposure (TTSv, 0) induced by 1/3 octave-band vibration.
We then measured TTSv after the exposure to a composite vibration composed of two 1/3 octave-band vibrations that might induce an equal magnitude of TTSv, 0 on the basis of the above relationship.
The TTSv, 0 induced by the composite vibration was not larger than the TTSv, 0 induced by the component vibrations.
This result suggests that the component of the vibration inducing the largest TTSv, 0 determines the TTSv, 0 by broad-band random vibration.
Mots-clés Pascal : Déplacement temporaire seuil, Trouble dû aux vibrations, Perception corporelle, Composition, Vibration, Homme, Exploration, Médecine travail, Exposition professionnelle, Seuil perception
Mots-clés Pascal anglais : Temporary threshold shift, Vibration induced disorder, Body perception, Composition, Vibration, Human, Exploration, Occupational medicine, Occupational exposure, Perception threshold
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0257129
Code Inist : 002A08E. Création : 199608.