This article describes the phenomenon of language in the act of simultaneous interpretation – to capture the unique character of the signification of seeing the enunciation, of processing it, and of the production into the target language with the equivalences between tone of voice and the utterances made in the source language. The focus of this investigation is the preference of voice modulation made by sign language interpreters for the oral Portuguese language. It analyzes the speech corpus of a deaf university student who took part in a roundtable discussion entitled "The University and the Deaf: an inevitable encounter" with a speech by a campaigner demanding the presence of sign language interpreters and educational changes at University.