This book provides comprehensive coverage of voice production, voice improvement, and articulation. In addition, pertinent material from related disciplines of speech and hearing sciences, linguistics, and phonetics is included. The seventh edition is updated to reflect contemporary information about voice production and diction-articulation, pronunciation, and intonation. In addition, it provides a comprehensive overview of voice, diction, and effective communication. A new Appendix D, Pronunciation Watch, has been added to address ESL speakers' intonation and articulation problems. This practical book equips readers with the knowledge of how to use the mechanisms for voice and oral language effectively.