  Rough speaking, information theory deals with data transmitted over a channel
such as the internet. Modern information theory is generally considered to have
been founded in 1948 by Shannon in his seminal paper, "A mathematical theory of
communication." Shannon's formulation of information theory was an immediate
success with communications engineers. Shannon defined mathematically the
amount of information transmitted over a channel. The amount of information
doesn't mean the number of symbols of data. It depends on occurrence
probabilities of symbols of the data. Meanwhile, psychophysics is the study of
quantitative relations between psychological events and physical events or,
more specifically, between sensations and the stimuli that produce them. It
seems that Shannon's information theory bears no relation to psychophysics
established by German scientist and philosopher Fechner. Here I show that to
our astonishment it is possible to combine two fields. And therefore we come to
be capable of measuring mathematically perceptions of the physical stimuli
applicable to the Weber-Fechner law. I will define the concept of new entropy.
And as a consequence of this, new field will begin life.
