2018 release ** The volume/CD Petropolis, a publication of the Department of Education and Learning of the University of Applied Sciences and Arts of Southern Switzerland, was born from a project by Xabier Erkizia (sound artist E) with the collaboration of Monica Fantini (radio author, F), Michele Mainardi (psychopedagogist, CH) and with the scientific coordination of Eliana Rela (historian, BR) and Lorena Rocca (geographer, IT). The fieldwork was carried out in October 2017 in the Petropolis neighborhood of Caxias do Sul (BR) on the occasion of the second edition of the Travelling Soundscape Workshop. The result of a sono-geographical investigation conducted in the Petropolis neighborhood (Caxias do Sul, Rio Grande do Sul, Brazil). It includes a 16-page booklet with text and photos that offer a psychogeographic portrait of the place. Petropolis is a project that invites a critical understanding of the meaning of sonic exploration.