The study of Voice and Speech Quality Perception starts with a fundamental question: "How do listeners perceive voice and speech quality and how can these processes be modeled?" Quantitative answers require measurements. This book approaches the problem by identifying major perceptual dimensions of voice and speech quality perception, defining units where possible and offering paradigms to position these dimensions in a structural skeleton of perceptual speech and voice quality. The emphasis is placed on voice and speech quality assessment of systems in artificial scenarios. This book bridges the gap between two quite diverse fields, engineering and humanities, and establishes the new research area of Voice and Speech Quality Perception.