抄録
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 and so these should be evaluated totally. In such environment, it is necessary to pay attention to the fact that some accumulative and multiplicative effects are 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 mutual correlation by employing only the usual standard type correlation analysis in terms of linear and/or nonlinear type regression functions. In this paper, a new trial of hierarchically extracting such mutual 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.
