A psychophysics model of predicting car seat static and dynamic discomfort

Dian D I Daruis, Mohd. Jailani Mohd Nor, Baba Md Deros, Mohammad Hosseini Fouladi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Most of previous literature focused on single modality in a car seat discomfort and its either static or dynamic condition. The aim of this paper is to integrate objective measurements and subjective evaluation to predict seat discomfort in which both static and dynamic conditions are considered. Steven's psychophysics power law relates a magnitude of a physical stimulus with its perceived sensation. The power law is applied in this study in which after expansion from its original equation ξ(φ)=kφn becomes ξ=a + bφsαa + cφfvβ where ξ is discomfort sensation, sa is static modality with exponent a and vβ is dynamic modality with exponent β. Static objective measurement was the seat pressure distribution measurement. The experiment was carried out on the driver's seat in a real car with the engine turned off. On the other hand, the dynamic objective measurement was carried out in a moving car on real roads. During pressure distribution and vibration transmissibility experiments, subjects were requested to evaluate their discomfort levels. Results from measurements and subjective evaluations produce seat pressure and vibration dose values; exponent for static modality a and exponent for dynamic modality β. In conclusion, it is established that predicting car seat discomfort is better and more holistic when both static and dynamic modalities are considered.

Original languageEnglish
Title of host publication18th International Congress on Sound and Vibration 2011, ICSV 2011
Pages2414-2421
Number of pages8
Volume3
Publication statusPublished - 2011
Event18th International Congress on Sound and Vibration 2011, ICSV 2011 - Rio de Janeiro
Duration: 10 Jul 201114 Jul 2011

Other

Other18th International Congress on Sound and Vibration 2011, ICSV 2011
CityRio de Janeiro
Period10/7/1114/7/11

Fingerprint

psychophysics
seats
exponents
pressure distribution
vibration
evaluation
roads
stimuli
engines
dosage
expansion

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Daruis, D. D. I., Mohd Nor, M. J., Md Deros, B., & Fouladi, M. H. (2011). A psychophysics model of predicting car seat static and dynamic discomfort. In 18th International Congress on Sound and Vibration 2011, ICSV 2011 (Vol. 3, pp. 2414-2421)

A psychophysics model of predicting car seat static and dynamic discomfort. / Daruis, Dian D I; Mohd Nor, Mohd. Jailani; Md Deros, Baba; Fouladi, Mohammad Hosseini.

18th International Congress on Sound and Vibration 2011, ICSV 2011. Vol. 3 2011. p. 2414-2421.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Daruis, DDI, Mohd Nor, MJ, Md Deros, B & Fouladi, MH 2011, A psychophysics model of predicting car seat static and dynamic discomfort. in 18th International Congress on Sound and Vibration 2011, ICSV 2011. vol. 3, pp. 2414-2421, 18th International Congress on Sound and Vibration 2011, ICSV 2011, Rio de Janeiro, 10/7/11.
Daruis DDI, Mohd Nor MJ, Md Deros B, Fouladi MH. A psychophysics model of predicting car seat static and dynamic discomfort. In 18th International Congress on Sound and Vibration 2011, ICSV 2011. Vol. 3. 2011. p. 2414-2421
Daruis, Dian D I ; Mohd Nor, Mohd. Jailani ; Md Deros, Baba ; Fouladi, Mohammad Hosseini. / A psychophysics model of predicting car seat static and dynamic discomfort. 18th International Congress on Sound and Vibration 2011, ICSV 2011. Vol. 3 2011. pp. 2414-2421
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