Invariant TSUs by repetition
Morphological description: One phase unit, non-time-delimited, made up of the slow repeti- tion of an increasing then decreasing sound motif. The shape of the profile can concern differ- ent morphological criteria (mass, dynamics, grain, etc.).
Semantic description: Each cycle conveys the feeling of being pushed forward and then driven back until the end. We get the impression that we are stagnating through this unit although we feel motion inside each cycle.