The present study originates from an ongoing research on the potential of human voice and on the possibilities of intervention afforded by the Tomatis method for the development of such potential. The discussion on vocal sonority is framed within the horizon of linguistic geography. In particular, the essay revisits Tomatis’ theory of languages in the light of more recent studies on the close relationship between linguistic background and melodic-intonation profile. The essay highlights the results of experimental research based on the (...) comparison of languages, studies which show that, with respect to intonation, every language puts different interpretative strategies into effect. These studies appear to be confirming the importance of Tomatis’ intuitions on factors which might determine varying expressive strategies between languages. (shrink)