Nishiyama K, Taoda K, Yamashita H, Watanabe S
Department of Preventive Medicine, Shiga University of Medical Science, Japan.
Int Arch Occup Environ Health. 1996;68(4):255-61. doi: 10.1007/BF00381437.
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.
八名健康受试者在隔音且温度调节的房间里，通过手握振动手柄，暴露于三个1/3倍频程带振动（63、200和500赫兹）下。在振动暴露前后，测量暴露指尖处125赫兹的振动感觉阈值。根据之前的一项研究，我们首先确定了振动加速度与1/3倍频程带振动引起的振动暴露后立即出现的振动感觉暂时阈移（TTSv,0）之间的关系。然后，基于上述关系，我们测量了暴露于由两个1/3倍频程带振动组成的复合振动后的TTSv，这两个振动可能会引起相同幅度的TTSv,0。复合振动引起的TTSv,0不大于各组成振动引起的TTSv,0。这一结果表明，引起最大TTSv,0的振动成分决定了宽带随机振动引起的TTSv,0。
