Sonia Sobrino Ralston (she/her) is a Master of Architecture student in her final year of study, where she is focusing on the spatial relationships of social movements and histories of technologies as part of her design thesis. Civil defense sirens, as objects that warn of impending danger are primarily an auditory experience, but their image, implied utility, and continued presence are critically important in their ability to shape perception and space over time. With the support of the CDH this semester, Sonia will aim to research and map the historic and contemporary locations of civil defense sirens in order to understand the spatial and social politics of who was to be protected and alerted, and who was exposed to sound pollution.