a. daily exposure value: the energy equivalent mean value of the frequency-weighted acceleration throughout the working day normalised to an eight-hour reference period (A(8)). A(8) = A(T)√T/8 where A(T) equals the daily exposure to vibration throughout a working day of a total duration of T hours. For hand and arm vibrations, A(T) is determined pursuant to NS-EN-ISO-5349-1, Chapters 4 and 5 and Annex A. For whole body vibrations, A(T) is determined pursuant to NS-ISO-2631-1, Chapters 5 to 7 and Annexes A and B as the daily exposure value in the axial direction giving the highest value when K factors for a sitting or standing person are employed; b. daily exposure limit value (A(8)): daily exposure value that shall not be exceeded; c. whole-body vibration: mechanical vibration transmitted to the whole body and entailing a risk of harm to health, in particular trauma of the spine, and that may also entail a safety risk; d. hand and arm vibration: mechanical vibration transmitted from work equipment to the human hand or arm and entailing a risk of vascular, bone or joint neurological or muscular disorders, and that may also entail a safety risk; e. daily exposure action value (A(8)): daily exposure value that requires the implementation of measures in order to reduce the risk to a minimum.
