Equivalent Comfort Contours for Vertical Seat Vibration: Effect of Vibration Magnitude and Backrest Inclination

Practitioner Summary: Vertical seat vibration is a main cause of vibration discomfort for drivers and passengers of road vehicles. A frequency weighting has been standardised for the evaluation of vertical seat vibration when sitting upright but it was not known whether this weighting is suitable for the reclined sitting postures often adopted during travel.