This work belongs in the field of Language Recognition, which ultimately aims to deter- mine the language of a given speech sample. This work mostly focuses on the study of acoustic feature extraction and of Deep neural network technologies in order to solve language recognition problems. In particular, the Log-mel extraction technique and the ECAPA-TDNN model are the main technologies that drew my attention and motivated this work. This document begins by introducing the concepts and history of Language Recog- nition. Then I explain what acoustic features are, their purpose and the specific case of log-mel features. To follow there is a report about Neural Networks which slides towards the more complex case of Deep neural network and the case of ECAPA-TDNN model.