This International Standard describes the mechanical impedance of the human male hand-arm system at the driving point. Values of the impedance, expressed as modulus and phase, are provided for three orthogonal, translatory directions of excitation that correspond to the xh, yh, and zh axes of the basicentric coordinate system defined in ISO 5349-1 and ISO 8727. The xh, yh and zh components of impedance are defined as a function of frequency, from 10 Hz to 500 Hz, for specified arm positions, grip and feed forces, handle diameters, and intensities of excitation. The components of impedance in the three directions are treated as being independent. This International Standard may be used to define typical values of the mechanical impedance of the hand-arm system at the driving point, applicable to males under the circumstances specified. For each impedance component, the impedance is defined at each frequency by three values, to reflect the range of values measured on male hands. The upper and lower values define the range of most probable values of impedance. The third value represents an overall mean of the human data, and defines the target value for all applications. This International Standard may be provisionally applied to females. Reference values of the mechanical impedance at the driving point are provided as a function of frequency for a specified grip and feed force in Annex A. These impedance values are intended for the determination of the transmissibility of resilient materials when loaded by the hand-arm system. Mathematical representations of the hand-arm system that model the mean values of impedance are provided in Annexes B to D. Examples of applications of the models are provided in Annexes E and F. To help conduct further measurement of the mechanical impedance, especially for circumstances that are not specified in this standard, information on the measurement of mechanical impedance is provided in Annex G.