Abstract
The body surface vibration induced by low frequency noise (noise-induced
vibration) was measured at the forehead, the anterior chest and the
anterior abdomen. At all the measuring locations, the increase steps
in the vibration acceleration levels of the noise-induced vibrations
was in good agreement with the increase steps, in the sound pressure
levels of the noise stimuli. The vibration acceleration level measured
at the forehead was found to increase suddenly at around 31.5-40
Hz, while the acceleration levels measured at the chest and abdomen
increased with frequency at approximately constant rates in the 20-
to 50-Hz range. Our results showed no clear evidence of the effect
of posture or bilateral asymmetry in the noise-induced vibration.
We found that the noise-induced vibrations measured at the chest
and abdomen were correlated negatively with the body fat percentage.
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