Wb—Weighting for vertical whole-body vibration, z–axis, seated, standing or recumbent person, based on ISO 2631–4.

Wc—Weighting for horizontal whole-body vibration, x–axis, seat back, seated person, based on ISO 2631-1.

Wd—Weighting for horizontal whole-body vibration, x– or y–axis, seated, standing or recumbent person, based on ISO 2631-1.

We—Weighting for rotational whole-body vibration, all directions, seated person, based on ISO 2631-1.

Wf—Weighting for vertical whole-body vibration, z–axis motion sickness, seated or standing person, based on ISO 2631-1.

Wh—Weighting for hand-arm vibration, all directions, based on ISO 5349-1.

Wj—Weighting for vertical head vibration, x–axis recumbent person, based on ISO 2631-1.

Wk—Weighting for vertical whole-body vibration, z–axis seated, standing or recumbent person, based on ISO 2631-1

Wm—Weighting for whole-body vibration in buildings, all directions, based on ISO 2631-2.