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2006, 6

Mitsuo Ohta, Yoshifumi Fujita

Inter-subjective relationship of higher-order among spatial-temporal wavy environmental factors – a methodological trial based on a standpoint of “Relationism-First”

language: English

received 13.11.2005, published 02.04.2006

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In this paper, first, partly is noted the suggestions by well-known philosophical emphasis of Herakleitos, Hegel etc. (i.e., several of famous other philosophers) based on their original standpoint that the truth exists not in fragmentarily individual things but only in their relational fact or process (i.e., event) itself through some concrete self-exercise of existing contradiction. That is, it is stated that a central core and/or primary existence is not in only mutual intermediation of time series type among past, present and future, but also mutual intermediation and/or relationship among different environmental factors in especially dynamic styles (more explicitly, some temporal) harmony and/or objectively latent (severe or hierarchical) contradiction. It seems true even if apparently it has no connection according to only our individual professional sense. After all, such a viewpoint of “Relationism(us)-First” seems to be exceedingly important to all things including our human being evolving after the beginning of only material nature with Big Bang. Two kinds of actual example of the above (hierarchical type) mutual correlation in the time series and mutual correlation distributed in the space among different environmental factors are considered. More concretely, the proposed method is applied especially to the acoustic environment in the actual indoor living surroundings. Then, the mutual intermediation among sound and light waves (served for utility) and leaked EM waves (served for risk) around personal computer under playing a game is investigated through some principle experiment. As the result, some effectiveness of the proposed methodology is experimentally confirmed by taking the mutual intermediation among only physical environmental factors as an example.

15 pages, 7 figures


APPENDIX I. High-tech pollution-environmental problems of wave motion type (24 kb, zip, pdf)

APPENDIX II. Our methodological background idea – the core characteristics of mutual intermediation “Relationism-first” (99 kb, zip, pdf)

APPENDIX III. Our guiding principle for analysis (79 kb, zip, pdf)

APPENDIX IV. Experimental situation related to time series regression model in sound environment and evaluation of prediction error (134 kb, zip, pdf)

APPENDIX V. Expression of the hierarchical property in the relationship configuration of inter-subjectivity (19 kb, zip, pdf)

Сitation: Mitsuo Ohta, Yoshifumi Fujita. Inter-subjective relationship of higher-order among spatial-temporal wavy environmental factors – a methodological trial based on a standpoint of “Relationism-First”. Electronic Journal “Technical Acoustics”,, 2006, 6.


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Mitsuo Ohta was born in 1928. He received his B.Sc. degree in physics in 1952 and his D.Sc. degree from Kyoto Univ. in 1961. After working as an associate professor at Kobe Univ. and serving as a professor at Fukui Univ. and Hiroshima Univ., he retired from Hiroshima Univ. (as an emeritus professor) and then Kinki Univ. He was named as a fellow of the International Institute of Acoustics and Vibration (IIAV) in 1999 and as a fellow of the Society of Instrument and Control Engineers of Japan in 1996. He has also received the title on Advising Engineer authorized by the Japanese Society of Noise Control Engineering. His research fields of study include microwave, dielectric, ultrasound and electromagnetic wave propagation and control engineering. In recent years he has conducted research in sound and vibration, stochastic systems engineering, signal information processing and EMC. He got two prizes in praise of his paper and his merit from the Acoustical Society of Japan and a prize of environmental protection from Japanese government and also Marquis Who’s Who in Science & Engineering 2005-2006.

e-mail: ryxyj592(at)


Yoshifumi Fujita received his B. E. degree in 1974 from Kyoto Institute of Technology and his M. S. degree in 1976 from Kyoto University, and his Dr. degree of Eng. in 2004 from Okayama University of Science. He was a Research Associate in 1976, Lecturer in 1982, and Associate Professor in 1987 in the Department of Mech. Eng., Kure Techinical College, Associate Professor in 1993, and Professor in 1995 in the Department of Management and Information Science, Onomichi Junior College, and Professor in 2001 in the Faculty of Economics, Management and Information Science. He is engaged in research on random signal processing and evaluation for EM and sound waves in environment. He is a member of the Acoust. Soc. Jap., IIAV, Inst. Syst. Contr. Inf. Eng. and IEICE.

e-mail: fujita(at)