Abstract
Human body surface vibration induced by low-frequency noise was measured
at the forehead, the chest and the abdomen. At the same time, subjects
rated their vibratory sensation at each of these locations. The relationship
between the measured vibration on the body surface and the rated
vibratory sensation was examined, revealing that the vibratory sensations
perceived in the chest and abdomen correlated closely with the vibration
acceleration levels of the body surface vibration. This suggested
that a person exposed to low-frequency noise perceives vibration
at the chest or abdomen by sensing the mechanical vibration that
the noise induces in the body. At the head, on the other hand, it
was found that the vibratory sensation correlated comparably with
the vibration acceleration level of the body surface vibration and
the sound pressure level of the noise stimulus. This finding suggested
that the mechanism of perception of vibration in the head is different
from that of the perception of vibratory sensation in the chest and
the abdomen.
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