John "Shôn" Eirwyn Ffowcs Williams, BSc, PhD, Hon. DSc (Soton), MA, ScD (Cantab), FREng (born 25 May 1935) is Emeritus Rank Professor of Engineering at the University of Cambridge and a former Master of Emmanuel College, Cambridge (1996–2002). He may be best known for his contributions to Aeroacoustics, in particular for his work on Concorde. Together with one of his students, David L.