Palmese, Carles Arribas and Rodríguez Antolín formulate listening as a mode of urban knowledge. Working in Puerta del Sol, Madrid, they combine soundwalks, improvised interview mapping, sound archives, performances, questionnaires, acoustic measurements and collective sound actions to examine how citizens perceive and produce the sonic character of a major public space. Their central contribution is methodological: quantitative measurement and situated listening are not competing epistemologies but complementary ways of approaching an environment whose meaning changes with time, activity and social context. Participants repeatedly exceed predefined sound categories, showing that perception generates descriptions unavailable to closed taxonomies. The authors consequently argue for adaptable, place-specific methodologies capable of integrating the present and the absent, the measurable and the experiential. The work bridges urbanism, music, environmental psychology, geography and participatory research. Its strongest implication is that urban observation is itself mobile and embodied: the city becomes intelligible through practices of attentive movement that record not only what occupies space but how space is collectively heard.