In this study, the voice simulations in German and Turkish (Lat. assimilare), in other words assimilations, the phonetic change in language which represents the transition from difficult to simple pragmatically and the assimilation were investigated as synchronical. At the same time there is a assimilation caused by language, the assimilation caused by agglutinating and inflected language. The assimilations are sound events which also seen in local dialects. From place to place in order to demonstrate that sound simulation events are examples of the diachronic words.