title: The vibration discomfort of standing people: evaluation of multi-axis vibration.
abstract: Few studies have investigated discomfort caused by multi-axis vibration and none has explored methods of predicting the discomfort of standing people from simultaneous fore-and-aft, lateral and vertical vibration of a floor. Using the method of magnitude estimation, 16 subjects estimated their discomfort caused by dual-axis and tri-axial motions (octave-bands centred on either 1 or 4 Hz with various magnitudes in the fore-and-aft, lateral and vertical directions) and the discomfort caused by single-axis motions. The method of predicting discomfort assumed in current standards (square-root of the sums of squares of the three components weighted according to their individual contributions to discomfort) provided reasonable predictions of the discomfort caused by multi-axis vibration. Improved predictions can be obtained for specific stimuli, but no single simple method will provide accurate predictions for all stimuli because the rate of growth of discomfort with increasing magnitude of vibration depends on the frequency and direction of vibration.
authors.affiliation: a Human Factors Research Unit, Institute of Sound and Vibration Research, University of Southampton , Southampton SO17 1BJ , UK.
authors.forename: Olivier
authors.initials: O
authors.lastname: Thuong
authors.affiliation: a Human Factors Research Unit, Institute of Sound and Vibration Research, University of Southampton , Southampton SO17 1BJ , UK.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Griffin
mesh_terms: D000054:Acceleration; D000328:Adult; D006801:Humans; D008297:Male; D011187:Posture; D014732:Vibration; D055815:Young Adult
keywords: discomfort; multi-axis vibration; standing; whole-body vibration