The objective of this analysis is to verify the existence of a relationship between Ear-Voice-Span (EVS) and linguistic pair in the process of simultaneous interpreting. The analysis was carried out on a corpus made up of 20 short speeches from the Plenary of the European Union: 10 for the French-Italian pair and 10 for the German-Italian one. The results showed a longer EVS in the speeches interpreted from German than from French. This suggests that the syntactic asymmetry between German and Italian has an impact on the interpreter's cognitive load and therefore on the EVS too. On the contrary, the structure of French, similar to the Italian one, allows the interpreter to keep a short EVS because of the lower need of syntactic restructuring and because of a lower cognitive load.