• Title, Summary, Keyword: comfort

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Effects of Noise on Indoor Thermal Sensation and Comfort (소음이 실내 온열감과 온열쾌적감에 미치는 영향)

  • Yang, Wonyoung
    • KIEAE Journal
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    • v.17 no.1
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    • pp.83-89
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    • 2017
  • Purpose: Thermal sensation or thermal comfort was randomly used in many studies which focused on combined effects of thermal and acoustic environments on human perception. However, thermal sensation and thermal comfort are not synonyms. Thermal comfort is more complex human perception on thermal environment than thermal sensation. This study aims to investigate effects of noise on thermal sensation and thermal comfort separately, and also to investigate effects of temperature on acoustic sensation and comfort. Method: Combined thermal and acoustic configurations were simulated in an indoor environmental chamber. Twenty four participants were exposed to two types of noise (fan and babble) with two noise levels (45 dBA and 60 dBA) for an hour in each thermal condition of PMV-1.53, 0.03, 1.53, 1.83, respectively. Temperature sensation, temperature preference, thermal comfort, noisiness, loudness, annoyance, acoustic comfort, indoor environmental comfort were evaluated in each combined environmental condition. Result: Noise did not affected thermal sensation, but thermal comfort significantly. Temperature had an effect on acoustic comfort significantly, but no effect on noisiness and loudness in overall data analysis. More explicit interactions between thermal condition and noise perception showed only with the noise level of 60 dBA. Impacts of both thermal comfort and acoustic comfort on the indoor environmental comfort were analyzed. In adverse thermal environments, thermal comfort had more impact than acoustic comfort on indoor environmental comfort, and in neutral thermal environments, acoustic comfort had more important than thermal comfort.

A Study on the Evaluation and Improvement of Riding Comfort for Railway Vehicle (여객열차 승차감 평가 및 향상방안 연구)

  • You, Won-Hee;Choi, Kyung-Jin;Koh, Sung-Soon;Park, Kyu-Han
    • Proceedings of the KSME Conference
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    • pp.170-175
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    • 2001
  • The riding comfort problem for railway vehicles of conventional line becomes increasingly important under the influence of the opening of Kyungbu high-speed and high-grade railway in 2004. Meaning of the term "riding comfort" of passenger train varies widely. In a narrow sense, the riding comfort means the comfort related to the vehicle vibration. But in a broad sense, the riding comfort means the comfort related to the cabin temperature, noise, illumination, smell, air-conditioning, etc. In this study, the riding comfort in a broad sense is treated and the direction of research for improving the riding comfort is presented.

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A Study on Textile Design Preferences in Outdoor Clothing According to New Senior Women's Psychological Comfort

  • Seo, Min Nyoung;Koo, Young Seok
    • Journal of Fashion Business
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    • v.20 no.3
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    • pp.1-16
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    • 2016
  • The purpose of this study is to analyze the differences in color, pattern, and texture of functional materials of outdoor clothing according to new senior women's psychological comfort. The data were collected from 163 female respondents aged 55-64 living in Busan. The results of the study are as follows. First, both the high and low psychological comfort groups preferred soft material the most. The high psychological comfort group particularly preferred soft textures and highly evaluated textured material in general. Second, both groups mostly preferred plain patterns while the high psychological comfort group preferred the dot pattern more. Third, in terms of colors, the high psychological comfort group preferred navy and purple, while the low psychological comfort group preferred brown. As to achromatic colors, both groups preferred black the most with the high psychological comfort group preferred gray and white more than the other group. Fourth, the high psychological comfort group preferred colors and patterns of clothing that made one look the most slimming, while the low psychological comfort group strongly preferred colors and patterns of clothes. Therefore, our results suggest that new senior women have a strong interest in outdoor clothing, not only in terms of textile functions, but also having interest in textile designs. In particular, the new silver women value psychological comfort in colors more than patterns of textile design.

Experimental Study on Thermal Sensation Evaluation in Heating(part I: Emotion & Sensibility Image Evaluation by Indoor Temperature Change in Heating) (실내 난방시 온열쾌적성 평가에 관한 연구(part I;실내 난방시 실온변화에 따른 감성이미지 평가))

  • 한남규;금종수;김형철;김동규;김창연
    • Proceedings of the Korean Society for Emotion and Sensibility Conference
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    • pp.41-46
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    • 2003
  • In recently, Is inhabiting more than 70% indoors during a day in case of company employee and ordinary people which is looking at usual business. Therefore Thermal comfort of human body about indoor temperature and air flow acting very heftily. When intestine temperature is fallen for external low temperature and air flow in winter in case enter into heated room feel comfort by effect of temperature and feel comfort or discomfort by room heating condition gradually. Therefore it is important that grasp thermal comfort about temperature and air flow in heating to keep continuous comfort in indoor dwelling. Temperature and thermal comfort factor of emotion & sensitivity image exert fair effect since heating middle although thermal comfort change greatly effect on sensation about temperature at actuality heating early. Need much study yet in vantage point of emotion & sensitivity although much study were held about thermal and comfort sensibility and when heat in existing research until now. Therefore this study is targeting that evaluate thermal comfort through introduction of estimation method by emotion & sensibility image real and synthetic sensibility about thermal environment that is becoming winter heating.

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Modeling for Evaluating the Comfort Sensibility using Fuzzy-Weighted Score (Fuzzy-Weighted Score를 이용한 쾌적감성 평가모형)

  • Jeon, Yong-Woong;Cho, Am
    • IE interfaces
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    • v.18 no.2
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    • pp.158-166
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    • 2005
  • Human-error and mental stress caused by psychophysiological dissonance between people and artificial environments have become a social problem. And it is a common knowledge that comfort environment reduces human-error and mental stress. Comfort sensibility is related to complex interactions between fabric, climatic, physiological and psychological variables. Currently, comfort sensibility has been evaluated by many sensory tests. However, it is difficult to evaluate comfort sensibility because a concrete concept of comfort sensibility is hard to define. In this paper, we propose a model to evaluate the comfort sensibility using Fuzzy-weighted score on an individual's subjective state for the stimulus. To represent the degree of comfort sensibility level for the stimulus, we represent comfort sensibility using 2 dimensional sensibility vector model. And we use the fuzzy-weighted score that is a fuzzy version of the weighted checklist technique computerized for evaluating the subjects. As an example, this model is applied to 1/f fluctuation sound evaluation. The results show that this model can be effectively used to the quantitative evaluation of comfort sensibility for the stimulus.

Development of comfort algorism for Indoor temperature chagne in Heating System (변동환경 대응을 위한 난방System의 쾌적 알고리즘 개발)

  • Kim, Dong-Gyu;Jeong, Yong-Hyun;Kum, Jong-Soo
    • Journal of Fisheries and Marine Sciences Education
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    • v.18 no.3
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    • pp.229-235
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    • 2006
  • This study investigated physiology and psychological response of subjects, when heat pump was operated long time within comfort temperature range. Eight subjects were participated for the experiment. Their age was from 22 to 25 years old. The results of this experiment will propose basic data for improving comfort control algorithm in fluctuating environment by using heat pump. When indoor temperature was controlled by heat pump, the conclusion was as follows. 1) When votes of subjects was considered, the thermal comfort neutrality or lower range helped formation of comfort sensation for subjects. 2) When room temperature was lower, thermal comforts of shoulder, knee and foot with subjects thermal comfort showed high correlation. And when room temperature was higher, thermal comfort of face region with subjects thermal comfort showed high correlation. 3) The necessity of temperature change after 50 minutes from initially operating heat pump demands the additional analysis against the physiological signal.

A Study on the Suggestion of Thermal Comfort Range in Radiant Floor Ondol Heating System

  • Chung, Kwang-Seop
    • International Journal of Air-Conditioning and Refrigeration
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    • v.12 no.2
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    • pp.108-112
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    • 2004
  • The purpose of this study is to investigate the characteristics of thermal comfort index and to present the thermal comfort range through regression analyses and experiment in a radiant floor heating system laboratory. The results were compared to the comfort zone of ISO-7730, and the applicability of the thermal comfort index to a radiant floor heating system was studied. On comparing the sedentary posture on the floor to sitting on the chair, the comfort zone and the neutral point of comfort index showed different values. It is considered that the influence of conduction from floor to the human is sufficient. Moreover, we could find a correlation between the thermal sensation votes of subjects, and the comfort indexes were lower than those by calculation.

Quantification of Seat Comfort Feeling Long-term Comfort (시트 착좌감 정량화 평가법 개발 롱텀 컴포트)

  • Park, Hyunkyu;Kim, Yungsik;Lee, Jaewon
    • Transactions of the Korean Society of Automotive Engineers
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    • v.22 no.5
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    • pp.1-4
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    • 2014
  • In recent years, requests for automotive seat comfort are increasing. An important issue of them is long-term seat comfort. Until now, the study for long-term seat comfort has been studied mainly using driver's questionnaire, changing adrenalin and electromyography. Actually the results and methodologies of them are difficult to apply to seat development and design because of money and time required. In this study, we developed Seating Feel Curve for seat comfort evaluation and a long-term seat comfort evaluation which can be applied to the development of seat comfort using seat support.

Comparison of Ride Comfort between Korean and European High Speed Railway by using Continuous Comfort Method (Continuous Comfort 방법을 이용한 국내외 고속철도 승차감 비교)

  • Choi, Il-Yoon;Um, Ju-Hwan;Lee, Jun Suk;Choi, Min-Ji;Lim, Jihoon
    • Journal of the Korean Society for Railway
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    • v.18 no.3
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    • pp.203-211
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    • 2015
  • Ride comfort of a vehicle can be utilized to maintain the track geometry and track irregularities because ride comfort of the rolling stock is affected by the characteristics of the vehicle and track. Ride comfort was evaluated according to the measured floor acceleration data of vehicles for a Korean high speed line as well as European high speed lines using Continuous comfort method which can be applied to track maintenance. The exceedance distribution of the ride comfort was quantitatively analyzed by the vehicle speed, the ride comfort of the Korean high speed line was compared with that of European high speed lines. It is shown that the ride comfort of Korean high speed line is better than that of European high speed lines, which indicates that the Korean track geometry and track irregularities are properly maintained.