Noise Source Contribution of Accelerating Cars and Subjective Evaluations

2007 ◽  
pp. 189-199
Author(s):  
Shunsuke Ishimitsu
Keyword(s):  
Noise Source ◽  
Source Contribution ◽  
Subjective Evaluations

scholarly journals Source Contribution Analysis for Exterior Noise of a High-Speed Train: Experiments and Simulations

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Jie Zhang ◽  
Xinbiao Xiao ◽  
Dewei Wang ◽  
Yan Yang ◽  
Jing Fan
Keyword(s):  
High Speed ◽  
Noise Source ◽  
High Speed Train ◽  
Noise Sources ◽  
Sound Sources ◽  
Lower Region ◽  
Source Contribution ◽  
Array Measurements ◽  
Noise Characteristics ◽  
Train Speed

This paper presents a detailed investigation into the contributions of different sound sources to the exterior noise of a high-speed train both experimentally and by simulations. The in situ exterior noise measurements of the high-speed train, including pass-by noise and noise source identification, are carried out on a viaduct. Pass-by noise characteristics, noise source localizations, noise source contributions of different regions, and noise source vertical distributions are considered in the data analysis, and it is shown how they are affected by the train speed. An exterior noise simulation model of the high-speed train is established based on the method of ray acoustics, and the inputs come from the array measurements. The predicted results are generally in good agreement with the measurements. The results show that for the high-speed train investigated in this paper, the sources with the highest levels are located at bogie and pantograph regions. The contributions of the noise sources in the carbody region on the pass-by noise increase with an increasing distance, while those in the bogie and train head decrease. The source contribution rates of the bogie and the lower region decrease with increasing train speed, while those of the coach centre increase. At a distance of 25 m, the effect of the different sound sources control on the pass-by noise is analysed, namely, the lower region, bogie, coach centre, roof region, and pantograph. This study can provide a basis for exterior noise control of high-speed trains.

717 Study on Noise Source Contribution of Accelerating cars and its audibility evaluations

2005 ◽  
Vol 2005.43 (0) ◽  
pp. 269-270
Author(s):  
Shunsuke ISHIMITSU ◽  
Hidenori URATA ◽  
Jyunpei TAKEDA
Keyword(s):  
Noise Source ◽  
Source Contribution

Noise source contribution analysis of accelerating cars by wavelets

2004 ◽  
Vol 2004.5 (0) ◽  
pp. 273-274
Author(s):  
Shunsuke ISHIMITSU ◽  
Hiroshi KOBAYASHI
Keyword(s):  
Noise Source ◽  
Source Contribution ◽  
Contribution Analysis

118 Study on Noise Source Contribution of Accelerating cars and its subjective evaluation

2005 ◽  
Vol 2005.15 (0) ◽  
pp. 69-71
Author(s):  
Shunsuke ISHIMITSU ◽  
Norio KUBO ◽  
Hidenori URATA ◽  
Jyunpei TAKEDA
Keyword(s):  
Noise Source ◽  
Subjective Evaluation ◽  
Source Contribution

Quantum noise models for semiconductor lasers: is there a missing noise source?

1997 ◽  
Vol 44 (10) ◽  
pp. 1929-1936 ◽  
Author(s):  
A. BRAMATI, V. JOST, F. MARIN and E. G
Keyword(s):  
Semiconductor Lasers ◽  
Quantum Noise ◽  
Noise Source ◽  
Noise Models

The Effects of Visual Displays in Attenuating Discrepancies Between Self-Reported and Physiological Indexes of Stress

2020 ◽  
pp. 1-5
Author(s):  
Jenny J. W. Liu ◽  
Julia Gervasio ◽  
Kenneth Fung ◽  
Kristin Vickers
Keyword(s):  
Social Stress ◽  
Visual Display ◽  
Physiological Measures ◽  
Response Strategies ◽  
Subjective Evaluations ◽  
Stress Task ◽  
Physiological Indexes ◽  
Physiological Outcomes ◽  
Physiological Markers ◽  
The Relationship

Abstract. This study examined whether the relationship between subjective and physiological outcomes of stress, and the responsivity to stressors, are affected by whether participants can see a visual display of their physiological output. Participants were randomly assigned to have a visible view of their physiological output readings, or to a condition in which physiological output readings were out of view. Participants individually completed a 30-min laboratory study including the modified Trier Social Stress Task. Both physiological markers of stress (heart rate and blood pressure) and subjective evaluations of stress (visual analog scale) were measured. Results found little congruency across subjective and physiological measures of stress. The visible visual display condition had elevated physiological arousal, while no group differences were observed in self-reported stress. Findings from the study provide insight into the use of visual physiological displays and hold practical implications for both the measurement of stress in research, and the development of wearable technologies without accompanying response strategies.

A Dissociation Between Subjective Evaluations and Behavioral Decisions Concerning Losses

2012 ◽  
Author(s):  
Eldad Yechiam ◽  
Guy Hochman ◽  
Ariel Telpaz
Keyword(s):  
Subjective Evaluations
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