In the "terrible year" of 1870-71 - spanning the Franco-Prussian War through the Commune - Parisians looked on with horror at the nightmarish transformation of their Ville Lumiere. They not only watched, they listened - garnering crucial information but also failing to shut out belliphonic sounds that rendered them sleepless, sick or even unable to function. In a flood of lectures and treatises, a generation of neurologists and psychiatrists assessed the impact of this year on French minds and bodies. Moreover, Charcot and Janet formulated early understandings of trauma amidst the cultural memories and traumatized populations impacted by 1870-71. Weaving together contemporary medical discourse, journals, reportage and iconography, this article reveals a topography of Parisian sonic violence. Drawing on Mark M. Smith and Jennifer Stoever's work on how race, gender, and class structure listening, this case study analyses the positionality of sound's traumatic impacts on nineteenth-century Parisians. Connecting sound, the events of 1870-71, and early conceptions of trauma also critically integrates these decades with subsequent experiences of la grande guerre. As I ultimately situate a specifically urban theorization of the aural experiences of war, I conclude with how sonic trauma of l'annee terrible might stretch far beyond 1870-71. Borrowing from Andreas Huyssen's concept of city as palimpsest - where visual reminders of violence leave 'absent presences' in the heart of an urban space - I query how sonic memories of conflict might similarly leave traces - sonic scars? - in both physical places and in individual and collective memories.