Java based speech analysis via Internet-SPANNET

Having developed the experimental speech analysis tools “SPANEX”, we have developed “SPANNET”, a program for the visualization and manipulation of speech analysis parameters via the Internet in our project “Virtual Laboratory”. It is implemented in Java. The graphical implementation acoustic applications have also been realized. It is obvious that with these interactive applications research contents can be mediated, for example, speech processing. The advantage of this Internet method is that it is platform independent and accessible through the WWW. It provides a means of editing and analyzing speech signals. The aim of this software is to ease acoustic-phonetic analysis of speech over the Internet. Using this tool one can record and play back sentences, compute, display, and analyze spectrograms or pitch contours as well as label speech utterances. Moreover, coarticulation phenomena can be studied, the voiced/voiceless error can be edited graphically and submitted to a smoothing procedure. The user can easily understand that human speech is concatenated by the excitation signal (represented by the pitch frequency signal or a noise-like signal) and the resonance characteristics of the mouth and nose cavity. It is not only instructive but also exciting to study both the visual and the audible variations of the fundamental frequency and dependence of different speakers and emotions