Her research interests are in the areas of robust, adaptive signal-processing techniques and performance bounds for source localization and tracking with applications in radar, sonar, aeroacoustics and satellite communications.She has held visiting researcher positions at the Naval Research Laboratory and the Army Research Laboratory, working on problems in underwater acoustic communications and tracking aero-acoustic targets using sensor networks. Bell has also worked as a consultant for SAIC, ArgonST and Lockheed Martin.Bell is currently the vice-chair of the Sensor Array and Multichannel Technical Committee of the Institute of Electrical and Electronics Engineers Signal Processing Society. She received her PhD in information technology from George Mason University.