Kenneth S. Brentner is a Professor of Aerospace Engineering at The Pennsylvania State University in University Park, Pennsylvania. He received his BS in Aeronautics and Astronautics from Purdue University, his MS in Aeronautics from The George Washington University, Joint Institute for the Advancement of Flight Sciences (JIAFS, located at NASA Langley Research Center in Hampton, Virginia), and his PhD in Acoustics from the University of Cambridge, England (Corpus Christi College, Cambridge). Upon graduation from Purdue, he joined the Aeroacoustics Branch at NASA LaRC where he performed computational and theoretical research on propeller and helicopter rotor noise. It was during this time that he developed the helicopter rotor noise prediction program WOPWOP based upon Farassat's formulation 1A. While at NASA he earned a PhD as a student of Professor Shon Ffowcs Williams while on graduate study leave. Upon return to NASA LaRC, Brentner was one of several Aeroacoustics Branch researchers that were involved in numerical work which they called "Computational Aeroacoustics" or CAA. Professor Brentner's research has continued to be focused on computational aeroacoustics and the Ffowcs Williams - Hawkings (FW-H) equation in particular. In 2000, Dr. Brentner joined the Department of Aerospace Engineering at The Pennsylvania State University and he continued his research on the noise of maneuvering rotorcraft, computational aeroacoustics, and novel uses of the FW-H equation. His research group has developed the new code PSU-WOPWOP, which is a very general FW-H solver. Professor Brentner served on several technical committees of both the American Helicopter Society and American Institute of Aeronautics and Astronautics; as Associate Editor and Editor in Chief of the Journal of the American Helicopter Society; as the 2011 Technical Chair of the AIAA/CEAS Aeroacoustics meeting held in Portland, OR and several other responsibilities. He is an Associate Fellow of the AIAA and has received several awards from NASA, Penn State, AIAA and AHS. Professor Brentner also regularly serves as a consultant on computational aeroacoustic and rotor acoustics.