Dr. Brían Hanrahan (PhD, Columbia University, NY) is a professor and researcher on film, media, and cultural history, focusing on the history of acoustic media, German and European cinema and the culture of the Weimar Republic. He has published on a range of subjects including the early history of the mobile microphone, avant-garde sound montage, Walter Benjamin and E.A. Dupont. His current book project The Vivid Thing in the Air: Liveness and Location in Weimar Media, is both a cultural history of location sound and an essay on the historical significance of electro-acoustic indexicality. Before Cornell University, he was a lecturer in the German Department at Princeton University.