Terry Nunn is a Consultant Scientist and Head of Audiology at Guy’s and St Thomas’ NHS Foundation Trust (GSTT). He is conducting his part-time PhD work at UCL. Dr Deborah Vickers is the primary supervisor, Prof Dan Jiang (from GSTT) is the clinical supervisor and Dr Tim Green is the second supervisor. The work is funded by a grant from Action on Hearing Loss to ‘Explore parameter variation in Cochlear Implant Fitting to Improve Speech Perception in Difficult Listening Conditions’. He has worked in the field of Auditory implantation for over 20 years and his research and clinical interests include electrical neural coding and speech perception outcome measures.