The Phonetics Study Group (Grupo de Estudos em Fonética, GEF), encompasses all members of Lafalin, including PhD researchers and researchers which work is in progress.

The goal of GEF is uniting researchers and students interested in the phonetic phenomena of  languages, be it from a strictly phonetics standpoint as well as from an associated phonological one, such as Dynamic Phonology. Besides these perspectives, contributions to an interdisciplinary one are possible, through the development of research focused on phonetic aspects of speech an exchange is stablished with cognitive sciences, music, singing and acting.