Dr Philip Harrison

Philip  HarrisonDr Philip Harrison (BEng MA PhD MIOA) is a senior forensic consultant, specialising in the areas of acoustics, phonetics and the analysis of evidential recordings.  He has worked at J P French Associates since 1997 and now works on a specific case basis. He has expertise in authentication, enhancement, transcription and speaker comparison. He also carries out research with the University of York in the fields of forensic speech and audio analysis: into the efficacy of acoustic analysis software, measuring the performance of biometric systems and evaluating methods for expressing the strength of forensic speech evidence. He is playing a key role in developing quality standards in the field in conjunction with the Forensic Science Regulator.

Case Experience

Dr Harrison has over 20 years of forensic experience and has worked on over 1000 cases in the field.  He has been involved in high-profile cases from a range of countries including Eire, Ghana, Gibraltar, Hong Kong, New Zealand, Pakistan, Uganda and Ukraine.  He has given evidence in the Court of Appeal (Criminal), Crown Courts in England, the Sindh High Court, Karachi (removed to England to hear expert evidence) and the High Court in Accra, Ghana.  He has worked on cases heard by the International War Crimes Tribunal and the Bloody Sunday Inquiry.


2001 – BEng (First class) Acoustical Engineering, Institute of Sound and Vibration Research, University of Southampton
2004 – MA (Distinction) Phonetics and Phonology, University of York
2015 – PhD in Linguistics, University of York

Positions and Offices

1998-present – J P French Associates, York
2005-2007 – Tutor on forensic speech analysis, International Summer School in Forensic Linguistic Analysis
2007-present – Teaching Fellow, Department of Language and Linguistic Science, University of York
2015-present – Associate Lecturer & Research Fellow, Department of Language and Linguistic Science, University of York


Member of the Institute of Acoustics and a committee member of the Speech and Hearing specialist group
Member of the International Association for Forensic Phonetics & Acoustics
Member of the British Association of Academic Phoneticians


Dr Harrison has presented and published widely in the field, reporting on cases, assessment of forensic systems and tools and on how expert evidence should be presented.  A range of his publications and presentations are listed in his CV.

His MA dissertation titled Variability of Formant Measurements is available to download.

Dr Harrison’s PhD thesis titled Making accurate formant measurements: an empirical investigation of the influence of the measurement tool, analysis settings and speaker on formant measurements can be downloaded too.


As well as teaching on the MSc in Forensic Speech Science, Philip Harrison has delivered training in the UK, the United States and Turkey.


Philip Harrison has been consulted as an expert for television and radio broadcasts and print articles on forensic speech and audio analysis:

Curriculum Vitae

Dr Philip Harrison CV