< 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