Allen Hirson is a senior lecturer in phonetics and director of the Speech Acoustics Laboratory at City University in London. He has worked on around 1100 cases involving evidential speech recordings over a 23 year period and has given evidence at all levels from magistrates to the International Criminal Court and International Commissions of Enquiry. As an independent forensic scientist he works equally for the prosecution and the defence, on questions around telephone recordings, covert recordings, speaker identification, speech decoding and other matters.
He has worked on more than 21 languages other than English, often collaborating with language specialists from around the world. Allen is a founder member of the professional association overseeing forensic phonetics internationally (IAFPA) and has been a Governor of the Expert Witness Institute since 2011.