Development of a frequency-separated knob with variable change rates by rotation speed

Article


Kim, H. and Ham, D. 2014. Development of a frequency-separated knob with variable change rates by rotation speed. Applied Ergonomics. 45 (6), pp. 1518-1529. https://doi.org/10.1016/j.apergo.2014.04.015
TypeArticle
TitleDevelopment of a frequency-separated knob with variable change rates by rotation speed
AuthorsKim, H. and Ham, D.
Abstract

The principle of frequency separation is a design method to display different information or feedback in accordance with the frequency of interaction between users and systems. This principle can be usefully applied to the design of knobs. Particularly, their rotation speed can be a meaningful criterion for applying the principle. Hence a knob can be developed, which shows change rates varying depending on its rotation speed. Such a knob would be more efficient than conventional knobs with constant change rate. We developed a prototype of frequency-separated knobs that has different combinations of the number of rotation speed steps and the size of the variation of change rate. With this prototype, we conducted an experiment to examine whether a speed frequency-separated knob enhances users' task performance. The results showed that the newly designed knob was effective in enhancing task performance, and that task efficiency was the best when its change rate increases exponentially and its rotation speed has three steps. We conducted another experiment to investigate how a more rapid exponential increase of change rate and a more number of steps of rotation speed influence users' task performance. The results showed that merely increasing both the size of the variation of change rates and the number of speed steps did not result in better task performance. Although two experimental results cannot easily be generalized to other contexts, they still offer practical information useful for designing a speed frequency-separated knob in various consumer electronics and control panels of industrial systems.

KeywordsFrequency separation principle; Speed frequency; Control-display gain
PublisherElsevier
JournalApplied Ergonomics
ISSN0003-6870
Electronic1872-9126
Publication dates
Print01 Nov 2014
Publication process dates
Deposited13 Apr 2016
Accepted28 Apr 2014
Output statusPublished
Additional information

Available online 23 May 2014

Digital Object Identifier (DOI)https://doi.org/10.1016/j.apergo.2014.04.015
Web of Science identifierWOS:000340697100018
LanguageEnglish
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