Abstract
A simple mechanical low-pass filter was applied to a vibration isolator for portable vibrating tools for the purpose of establishment of its design method. As the isolator was inserted between the tool and the human hand, the effect of terminating the isolator by the human hand on transmission of the vibration was studied on the isolator with and without a mechanical resistance. For analysis of the total system, the theory of electric transmission circuits was used after conversion of mechanical systems into equivalent electric circuits by employing the force-current correspondence. The mechanical impedance was utilized for the simulation of the human hand. A possibility of substitution of the hand for the equivalent pure mass was confirmed in the low frequency region.
