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The term “species-specificity” has been often used to define what elements underlie human nature. It has had various meanings, most of which can be interpreted as “special”,“unique”. A due definition of this term is not only necessary to move out linguistic misinterpretation from our research field, but it is also useful to investigate, in a non anthropocentric way, such anatomical and functional traits that have been considered uniquely human since Aristotelian works. In the present paper a technical definition of species-specificity is offered as a constraining capability: an auditory-vocal technology which influences the sapiens’ specific way to build representations of reality. This is possible thanks to biological structure which have been selected during human evolution (including the loss of some morphological aspects, ie gracilization, a process named handicap selection).