volume | PIER Journals

Abstract

In this paper, a trial of probabilistic signal processing which is possible to give methodological suggestion to some quantitative measurement method of compound and/or ac-cumulation effect in electromagnetic (abbr. EM) environment is discussed. In order to extract various types of latent interrelation characteristics between many of waved environmental factors (EM and sound waves) leaked from VDT in a real working situation, some extended regression system model reflecting hierarchically not only linear correlation information of the lower order but also nonlinear correlation information of the higher order is firstly introduced. Especially, differing from the previous study, all regression parameters of this model are identified by positively utilizing information of a background EM noise instead of eliminating it. Then, some evaluation method for predicting a whole fluctuation distribution form from sound to EM is newly proposed. Finally, the validity and effectiveness of this proposed method are partly confirmed through some principle experiment too by applying it to the actually observed data leaked by a VDT playing some television games in the room of an actual working environment.

1. Lin, J. C., "Auditory perception of pulsed microwave radiation," Biological Effects and Medical Applications of Electromagnetic Energy, O. P. Gandhi (Ed.), Prentice Hall, 1990. Google Scholar

2. D’Arsonval, M. A., "Dispositifs pour la mesure des courants alternatifs de toutes frequencies," Compt. Rend. Soc. Biol., Vol. 3, 450-451, 1896. Google Scholar

3., Vol. 16, No. 1, 26-29, for example, IEC CISPR PUBLICATIONS, 66–71, 1994.

4. Federal Communications Commission, Guidelines for Evaluating the Environmental Effects of Radio-frequency Radiation, FCC 96-326, Washington D.C., 1996.

5. Spiegel, R. J., "The thermal response of a human in the near-zone of a resonant thin wire antenna," IEEE Trans. Microwave Theory & Tech., Vol. 30, 177-185, 1982.
doi:10.1109/TMTT.1982.1131044 Google Scholar

6. Joines, W. T. and C. F. Blackman, "Power density, field intensity, and carrier frequency determinants of RF-energy-induced calcium-ion efflux from brain tissue," Bioelectromagnetics, Vol. 1, 271-275, 1980.
doi:10.1002/bem.2250010303 Google Scholar

7. Pieron, H., La Sensation, trans. in Japanese, T. Shimazaki and S. Toyoda, Hakusuisha Ltd., Tokyo, 1958.

8. Semom, P., T. Schneider, and L. Vollrath, "Effects of an earthstrength magnetic field on electrical activity of pineal cells," Nature, Vol. 288, 607-608, 1980.
doi:10.1038/288607a0 Google Scholar

9. "A time domain technique for measurement of the electromagnetic noise,", Measurement Technique Research Committee on Time Domain Electromagnetic Noise, The Institute of Electrical Engineers of Japan (Ed.), Corona-sha, Tokyo, 1995 (in Japanese). Google Scholar

10. "Biological effect of electromagnetic field and measurement,", Measurement Technique Research Committee on Biological Effect of High Frequency Electromagnetic Field, The Institute of Electrical Engineers of Japan (Ed.), Corona-sha, Tokyo, 1995 (in Japanese). Google Scholar

11. Ohta, M., A. Ikuta, and H. Ogawa, "Mutual relation characteristics among light, sound and electromagnetic waves leaked from the actual working VDT — Introduction of a system model with nonlinear discrete regression type," Journal of Acoustical Society of Japan, Vol. 53, No. 10, 807-810, 1997. Google Scholar

12. Ohta, M. and H. Ogawa, "A methodological trial of regression analysis with higher order correlation between electromagnetic and sound waves leaked by a VDT in an actual working environment," Journal of Electromagnetic Waves and Applications, Vol. 12, No. 10, 1357-1367, 1998.
doi:10.1163/156939398X01448 Google Scholar

13. Ohta, M., A. Ikuta, and N. Takaki, "A new trial of regression analysis with less information loss and its application to sound insulation wallsmatching to the prediction of response probability distribution," Journal of Acoustical Society of Japan, Vol. 44, No. 11, 848-856, 1988. Google Scholar

14. Ohta, M. and T. Koizumi, "General statistical treatment of the response of a nonlinear rectifying device to a stationary random input," IEEE Trans. Information Theory, Vol. 14, No. 4, 595-598, 1968.
doi:10.1109/TIT.1968.1054178 Google Scholar

15. Cramer, H., "Mathematical Methods to Statistics," Princeton University Press, New Jersey, 1974. Google Scholar

16. Tricomi, F. G., Vorlesungen uber Orthogonal-reihen, Springer-Verlag, Berlin, 1955.
doi:10.1007/978-3-662-13399-6

17. Robbins, H. and S. Monro, "A stochastic approximation method," Annal. of Math. Stat., Vol. 22, 400-407, 1951.
doi:10.1214/aoms/1177729586 Google Scholar

Professor Mitsuo Ohta

Dr. H. Ogawa