Reducing car audio button noise while maintaining tactile quality

Hyo Chan Kwon, Chang Hee Cho, Cheong Wu Nam, Soo Won Chae, Seong Yun Seo, Kwon Hee Kim

Research output: Contribution to journalArticlepeer-review


Recently, interior noise levels of passenger cars have been significantly reduced. The reduction of major cabin noise led to the recognition of small noises that are previously unnoticed. Specifically, the button noises of electrical devices in passenger compartments have been identified as belonging to this category of noise. The aim of this study is to improve the auditory quality of a car audio button while maintaining its tactile quality that is familiar to users. The tactile and auditory qualities can be described by the load versus stroke characteristics and the operation noise level. For buttons with rubber domes, the buckling behavior of the domes governs the tactile and auditory qualities. To preserve the tactile quality, the sensitivity of load versus stroke characteristics to each of the eight identified parameters is obtained from the finite element analyses using model parameters varied by ±10%. Four parameters to which the tactile quality was insensitive are selected. To identify the contributions of these four design parameters to auditory quality, finite element analyses were performed in conjunction with design of experiments. The improved design obtained by the subsequent response surface methodology optimization was validated by a prototype test with a 12 dBA reduction in noise.

Original languageEnglish
JournalAdvances in Mechanical Engineering
Issue number1
Publication statusPublished - 2018 Jan 1

Bibliographical note

Funding Information:
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), which is funded by the Ministry of Science, ICT & Future Planning (MSIP) (No. 2007-0056094).

Publisher Copyright:
© 2018, © The Author(s) 2018.


  • Car audio button
  • auditory quality
  • design of experiments
  • ergonomic design
  • response surface methodology
  • rubber dome
  • tactile quality

ASJC Scopus subject areas

  • Mechanical Engineering


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