< Figure of one part of element 1
of utterance japanese vowel "A">
In  figure above, set of mark +  represents  one part of
element
1 of utterance japanese vowel "A." Comparing to a formula 
consisted of  exp * sin waves,  it consists of waves of
which  level and  cycle is
unstable.  Maybe, glottis movement (period of shut up, opening,
and shutting) may reflect its change.
If fundamental frequency wave information  is lost in
communication  transmission, it is able to be roughly gotten by
analysis of Element. 
And  localized portion of the wave can be approximated to a
combination of two sin waves of which frequency differs  means
that the wave may be generated from spaces connecting each other. 
Consisting of a
combination of two sin waves is important. Because by relation of 
the two waves, it may be estimated what place of space the signal
occurs.
No.5b, 24 June 2007