A stochastic signal processing method for linear and nonlinear mutual correlation effect among electromagnetic, sound and light waves leaked from VDT

摘要

Nowadays, owing to the widely applied electronic technology equipments, we are always exposed to electromagnetic wave radiated from them. At the same time, we are affected by the sound noise and light wave. In such environment, it is necessary to find whether some accumulative and multiplicative effects arc caused by them both physically and psychologically. For this purpose, first, it is important to know the correlation information among them as deeply as possible. However, since originally these fluctuate respectively in a non-Gaussian distribution form, it is difficult to find this correlation by employing the usual standard type correlation analysis in terms of artificially established linear and/or nonlinear type regression functions. In this paper, a new trial extracting correlation is proposed based on the conditional probability density function form derived from a statistical type Hermite series expansion expression of two-variate joint probability density function. The proposed method has been confirmed by applying it to the electromagnetic, sound and light leaked from VDT.