Speech analysis in the time domain using syntactic technics an attempt to formalize the description of phonemes using acoustical cues

Study of acoustical cues in our main topic. Using a visual observation of a great amount of speech signals, we have developped a tool which allows to fomalize the knowledge acquired by the observer. We use rewriting rules which are context sensitive and controlled by a semantic information. We are looking for a lot of acoustical cues without taking in account the possible redundancies, for example: friction, occlusion, voicing and cues issued from an analysis in synchronous with the pitch period.