Abstract
On using aroma to improve the workplace productivity with increasing their comfort, an intermittent exposure method is considered to be more effective than a continuous exposure method, which causes olfactory habituation. On the other hand, since there is concern about the effect of repeated exposure on olfactory fatigue, it is thought that it would be meaningful in the future to be able to evaluate the tendency of aroma intensity to decay with time in intermittent exposure with a numerical index. Using aroma intensity evaluations in intermittent and continuous exposure experiments using two aroma, two cases were examined: one in which the constant term of the regression curve was used as an index, and the other in which the area of the regression curve up to a arbitrary elapsed time was used as an index. With both indices, the aroma intensity evaluation in the intermittent exposure method was greater than that in the continuous exposure method, indicating that the intermittent exposure can maintain the aroma intensity for a longer time. In addition, the latter index was more convenient in that it could evaluate the cumulative aroma intensity up to an arbitrary time. Furthermore, using these indices, the spray concentration and spray interval set in the experiment were compared between conditions, and it was shown that the effect of the spray concentration on the index was relatively small, and that the longer the spray interval, the greater the index.
