Vibration and Shock Measurement

Licht, Torben Rask; Zaveri, K.

doi:10.1177/002029408201500101

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2021

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“…Low-frequency vibrations interfere with the function of the vestibular apparatus, causing phenomena of motion sickness, dizziness and proprioception disorders of the body. In the transverse direction, the most annoying vibration frequencies for the human body are those of 1-2 Hz; in the vertical one (feet-head) instead the more annoying are those between 4 and 8 Hz [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

An Approach to the Definition of the Aerodynamic Comfort of Motorcycle Helmets

et al. 2021

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The aim of this work is to obtain a reliable testing methodology for the characterization of the perceived aerodynamic comfort of motorcycle helmets. Attention was paid to the rider’s perception of annoying vibrations induced by wind. In this optic, an experimental comparative campaign was performed in the wind tunnel, testing 16 helmets in two different configurations of neck stiffness. The dataset was collected within a convolutional neural network (CNN or ConvNet) of images, creating a ranking by identifying the best and the worst helmets. The results revealed that each helmet has unique aerodynamic characteristics. Depending on the ranking scale previously created, the aerodynamic comfort of each helmets can be classified within the scale.

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Section: Introductionmentioning

confidence: 99%