Study of Sound and Cabin Touchpoint Contributions to Subjective Perception of Secondary Ride

<div class="section abstract"><div class="htmlview paragraph">Subjective perception of vehicle secondary ride is dependent on simultaneous touchpoint vibrations and audible inputs to the occupants. Standards such as ISO 2361 provide guidelines for objective assessments of human body thresholds to vibration [<span class="xref">1</span>]. However, when a human experiences vibration inputs at multiple touchpoints, as well as aural inputs, it becomes complicated to judge each individual contribution to the overall subjective perception [<span class="xref">2</span>]. Additional factors, such as ambient conditions, ergonomics, age, gender etc. also play a role. Secondary ride, which is defined as energy in the 10-30 Hz frequency range, is one such event that affects the customers’ perception of ride comfort and quality. The goal of this work is to develop a sound and vibration simulator model and execute a secondary ride jury study of vehicle driving over cleats. The aim of the study is to rank the contributions of each touch point vibration input, as well as sound to the overall subjective perception of secondary ride during these impact events. The driver touch points considered in this study are floor, steering wheel, seat back, seat pad/cushion and driver ear noise.</div></div>