Ernst Karel works with sound, including electroacoustic music, experimental nonfiction sound works for multichannel installation and performance, image-sound collaboration, and postproduction sound for nonfiction film, with an emphasis on observational cinema. Lately he works around the practice of location recording (or ‘fields recording’) and composing with those recordings, with recent projects also taking up archival location recordings. Sound projections have been presented at Sonic Acts, Amsterdam; Oboro, Montreal; EMPAC, Troy NY; Arsenal, Berlin; and the 2014 Whitney Biennial. Sound installations in collaboration with Helen Mirra have been exhibited at the Gardner Museum, Boston; Culturgest, Lisbon; KW Institute for Contemporary Art, Berlin; Audiorama, Stockholm; MIT List Visual Arts Center, Cambridge; and in the 2012 Sao Paulo Bienal. Audio-video collaborations include Expedition Content (2020, with Veronika Kusumaryati), Ah humanity! (2015, with Lucien Castaing-Taylor and Véréna Paravel) and Single Stream (2014, with Toby Lee and Pawel Wojtasik). From 2006 until 2017 he managed the Sensory Ethnography Lab and the Film Study Center at Harvard University, where he did postproduction sound for vilms including The Iron Ministry, Manakamana, and Leviathan. He developed and has taught a practice-based course in ‘sonic/audio ethnography’ both at Harvard (most recently in spring of 2021) and through the Center for Experimental Ethnography, University of Pennsylvania (fall 2019).