Key Features: Completely revised to reflect the research and technological advances of the last decadeNew chapters on directional microphones and the latest digital signal processing strategiesExtensive coverage of all aspects of open-canal, thin-tube hearing aidsPractical tips, tables, and procedures designed to be pinned on the walls of clinicsEach cross-referenced chapter builds on the previous chaptersHearing Aids, Second Edition, is a book within a book: Each chapter has a one-page synopsis that captures the key concepts of each topicThe material that students most need is contained in marked paragraphs that flow after each other to form a coherent thin book inside the larger bookIntervening additional paragraphs add satisfying depthWritten, comprehensively referenced, and extensively reviewed by leaders in the field, this book is ideal as a core graduate text as well as a standard reference for clinicians.