Now available in a fully revised third edition, this comprehensive introduction to phonetics and phonology familiarizes the reader with detailed knowledge of articulatory and acoustic phonetics as well as the foundations of phonological analysis. Featuring numerous figures throughout, it assumes no prior knowledge of the subject. The new edition features a number of valuable changes, including: Updated chapters on the anatomy, physiology and acoustics of speech production, which include recent research findings. A thorough revision of the chapter on speech perception. An expanded chapter on prosody, including a major section on autosegmental metrical models. Additional material on theoretical phonology, including a new section on constraint-based theories, including Optimality Theory and new sections on L1 and L2 acquisition and sociolectal variation. By integrating new findings, theories, and references, the third edition of "An Introduction to Phonetics and Phonology" is the most thorough and complete resource on the subject to date.