The objective of the chapter is to derive, from a tube 18 cm in length, an acoustic production system well adapted for communication needs according to principles: the shape of the acoustic tube must be deformed so that the acoustic contrast is always “sufficient” or “maximum” between the sounds it produces, the smallest possible area deformations lead to the largest possible formant variations (minimum of energy principle). The deformations so obtained can be represented by a limited number of commands (called “speech gestural deformations” or “speech distinctive gestures”) summarized within the Distinctive Region Model. It can be observed that the dynamic of the model is consistent with the speech production system. Most importantly, the simulations predict the vowel triangle which has the largest possible area that can be obtained with an acoustic tube of fixed length. The deductive approach also allows us to infer standard places of articulation for vowels and consonants and thereby identify the primary physical underpinnings of phonological distinctions. This approach predicts vocalic systems and the role of F3 in the /d, g/ distinction.Using sequential and/or parallel (coproduced) combinations of distinctive gestures, V₁V₂ and V₁CV₂ utterances are easily generated. Perception of gesture combinations indicates that, in VV and VCV utterances, a surprisingly high degree of perceptual invariance can be achieved despite relatively large variations of gesture characteristics, such as gesture asynchrony, duration, and movement trajectory.