Effects of seat back height and posture on 3D vibration transmission to pelvis, trunk and head

Vibration transmission is essential in the design of comfortable vehicle seats but knowledge lacking on 3D trunk and head motion role seat back posture. We hypothesized that reduced when participants’ upper unsupported, as this stimulates active postural control. developed an experimental methodology to evaluate vibration from compliant human body. Wide-band (0.1–12 Hz) stimuli were applied fore-aft, lateral vertical direction translational rotational body response pelvis, head. A standard car was equipped with a configurable support test 3 heights sitting postures (erect, slouched, preferred) where we also tested down looking at smartphone. Seat height posture substantially affected low frequency responses particular for segment rotation. According our hypothesis proved beneficial reducing motion. Our effectively evaluates wide-band The lowest perceived least comfortable. This calls designs which do not so much constrain back. enlarged motion, pleading computer system integration allowing heads up future automated cars. biomechanical data will serve validate models supporting (automated) vehicles. • Experimental transmission. Low led lower comfort. head-down