A trial on higher order mutual correlation for acoustic and electromagnetic environment around VDT

Nowadays, owing to the rapid and wide application of many
type information technology equipments, we are always exposed to acoustic and
electromagnetic waves. For evaluating step by step these complicated
accumulative and multiplicative effects, it is first important to extract the
correlation information among them as deeply and quantatively as possible. In
this paper, some new trial of hierarchically evaluating mutual correlation
between them is proposed based on the conditional probability density function
form derived from a statistical type Hermite series expansion expression for the
two-variate joint probability density function. The proposed method has been
experimentally confirmed by applying it to the actual environment around~VDT.