Gathering information about the acoustic environment of urban areas is now possible and studied in many major cities in the world. Part of the research is to find ways to inform the citizen about its sound environment while ensuring her privacy. We study in this paper how this application can be cast into a feature inversion problem. We argue that considering deep learning techniques to solve this problem allows us to produce sound sketches that are representative and privacy aware. Experiments done considering the dcase2017 dataset shows that the proposed learning based approach achieves state of the art performance when compared to blind inversion approaches.