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Study of human comfort under thermal and vibratory environment using physiological indices
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2009 (English)In: 16th International Congress on Sound and Vibration 2009, ICSV 2009, 2009, 4376-4383 p.Conference paper (Refereed)
Abstract [en]

Besides the vibrations, passenger discomfort is influenced by various other factors such as, the environmental factors of noise, temperature, humidity and visual stimuli, etc. The discomfort can be measured both subjectively and objectively. Rammohan25 studied the influence of backrest support and handgrip contractions on acute metabolic, respiratory, and cardiovascular responses during exposure to whole-body vibration (WBV). In the present work, discomfort of passengers subjected to whole body random vibrations, environmental factors such as temperature, humidity and noise level variations by assessing their effect on various physiological parameters like, Pulse Rate, Respiration Rate, Galvanic Skin Response, Skin Temperature, Heart Rate, Heart Rate Variability and ECG values has been studied. The study was conducted on the three axes vibration simulator developed in the Laboratory, IIT Roorkee, India as a mock-up of a railway vehicle. The simulator room has a controlled temperature and humidity environment and its noise level can also be controlled. A BIOPAC system was used for data acquisition along with various modules for measuring physiological parameters. The mean and standard deviation of physiological parameters, possibly indicating the human comfort or discomforts for the 12 subject is found out. The design of experiment (ANOVA) was employed to quantify the relationships between measured responses and the input factors. The results show that some physiological parameters viz, pulse rate, SKT and HR show variation in vibration condition at 0.6 m/s2. It is also found that all the parameters affected by noise level and temperature show significant variation between no vibration condition and vibration condition.

Place, publisher, year, edition, pages
2009. 4376-4383 p.
Keyword [en]
Controlled temperature, Environmental factors, Galvanic skin response, Heart rate variability, Heart rates, Human comforts, Input factors, Noise levels, Passenger discomfort, Physiological indices, Physiological parameters, Pulse rate, Railway vehicles, Random vibrations, Respiration rate, Skin temperatures, Standard deviation, Three axes, Vibration condition, Visual stimulus, Whole body, Whole-body vibrations, Electrophysiology, Heart, Physiological models
National Category
URN: urn:nbn:se:kth:diva-152011ScopusID: 2-s2.0-84871457450ISBN: 978-161567736-8OAI: diva2:749090
16th International Congress on Sound and Vibration 2009, ICSV 2009, 5 July 2009 through 9 July 2009, Krakow, Poland

QC 20140923

Available from: 2014-09-23 Created: 2014-09-23 Last updated: 2014-09-23Bibliographically approved

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Berg, Mats
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