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http://dx.doi.org/10.5762/KAIS.2014.15.1.547

A Study on the 'a' index of Sound source for Productivity improvement  

Yoo, Young-Jo (Department of Building Equipment & System Engineering, Gachon University)
Kim, Myung-Ho (Department of Building Equipment & System Engineering, Gachon University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.15, no.1, 2014 , pp. 547-554 More about this Journal
Abstract
In this study, have researched 'a' index from three sound sources, effects on subject and finding optimal 'a' index, which can improve subject's stability, concentration and productivity. Check the health status of subjects who were selected 5 male and 5 female university students, and the period of this experiment was about two months. It were measured each subject's EEG, HRV and vibra image to analyze transition of stability, concentration, stress and heart beat. The results was measured in an environmental test room of temperature $25[^{\circ}C]$, the relative humidity 50 [%], illuminance 1,000 [lux] and air current speed 0.02[m/sec] with 'a' index of three sound sources which are a=1.106, a=1.749 and a=2.227. Results in a=1.106 compared to before exposure, relative $S{\alpha}$ wave, relative $L{\beta}$ wave and relative $M{\beta}$ wave have been revitalized, asymmetry index, stress and HRV have been decreased. Thus, to increase stability, concentration and productivity, also to decrease stress, changes in sound source of a=1.106 was found to be the most effective.
Keywords
EEG; 1/f fluctuation; HRV; Productivity; Vibra image;
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Times Cited By KSCI : 4  (Citation Analysis)
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