odor

There is no doubt that odor is also an important factor to evaluate indoor air quality. Since the olfactory system was proven to be closely related to the limbic structures which support emotion, long-term memory and motivation, the psychological and the physiological effects of the essential oils have been widely researched in various fields. The odor environment formed by essential oils is popularly used in commercial facilities to make customers have special mood.

The concentration of carbon dioxide is used as an important index of indoor air quality representative of body odor or bioeffluents in Japan. In the construction field of Japan, there is a CO2 concentration standard of a thousand ppm or less. However, property of occupants (such as sex, age and nationality) has non-nogligiblw effect on the room odor environment. Thus the standard of ventilation air volume should be decided suiting up for building use and occupants.

It is well known that the olfactory sensitivity changes with exposure time and concentration of odor under continuous exposure to odor in the air. This decrease of odorous sensitivity, the increase of odorous threshold in other words due to continuous exposure to odor is called olfactory adaptation. 

This study was aimed at making a model which predicted olfactory sensation. Firstly, it was conducted the experiment, which odor was exposed to subjects constantly and subjects evaluated odor, to investigate the olfactory adaptation process. As a result, it was turned out odor intensity decreasing exponentially as time. Secondly, validity of the previous theoretical model ( Osako,1991 ) was investigated by comparing the evaluation.

“Tatami” is a traditional Japanese building material used as a floor mat made with rush. It used to be said that the smell of tatami is preferred by many Japanese, because almost all Japanese houses have had tatami rooms since early times. In this paper,

There are a lot of aspects for evaluation of odor. Not only the hedonics aspects but also thepleasantness aspects are very important for the building design. Authors have investigated the sensoryevaluation of odor from building materials and turned our attentions to the psychological process ofodor evaluation. In this paper, odors emitted from four building materials that is wood, wood flooring,Tatami (Japanese traditional rush mat) and concrete were adopted and the sensory evaluation tests byhuman subjects were conducted.

In this study, five different types of smoking spaces and non-smoking spaces were investigated in orderto discuss about tobacco odor leakage from smoking area. VVOCs, VOCs and aledehydes wereanalyzed for characterization of odor. Additionally, the isolation result has been identified bydetermining ETS markers (nicotine and 3-ethenylpridine) based on ISO1845.Determined compounds were quantified and categorized into 13 groups, concentration between thesmoking space and non-smoking space was compared. In the most case, the concentration innon-smoking space was lower than smoking space.

The investigation was conducted to investigate the relationship between thermal conditions andindoor air quality during summer in a new unit-type nursing home. Almost all occupants in the nursinghome spend the daytime in the nursing homes common space area. We set out to examine how theindoor environment changes and what influence the thermal environment has on odor, and thereforetook readings in the common space for room temperature, relative humidity, CO2 concentration andodor levels.