This book presents a collection of accounts by internationally renowed experts on current techniques in the instrumental investigation of speech and disorders of speech.

Martin J. Ball is Hawthorne-BoRSF Endowed Professor and Director of the Hawthorne Center for Research in Communicative Disorders at the University of Louisiana at Lafayette. His books include Clinical Sociolinguistics - Wiley-Blackwell, 2005 -, and Phonetics for Communication Disorders and Critical Concepts in Clinical Linguistics.

Chris Code, MA, PhD, FRCST, FBPsS, is Hon. Professorial Research Fellow, Department of Psychology, University of Exeter, and past Foundation Professor in Communication Sciences and Disorders at the University of Sydney. He received the 2010 Robin Tavistock Award for Services to Aphasia. He is alos Patron of AphasiaNow and co-founding Editor of Aphasiology. Research interests include neuropsychology of language/speech, recovery and treatment of aphasia, psychosocial consequences of aphasia, public awareness and history of aphasia, apraxia and the evolution of language.