The book "Microphone Arrays" offers a comprehensive and detailed examination of the development and application of microphone arrays, which began over 20 years ago. It serves as a valuable resource that covers both theoretical and practical aspects of this technology. The editors, Michael Brandstein and Darren Ward, have invited leading researchers to share their insights and experiences in this field. The collection of articles provides a deep insight into the current advancements and challenges in microphone array research. The structure of the book is divided into four main parts, addressing the theoretical foundations, specific applications, and future developments in microphone array technology. This comprehensive reference is of great interest to both professionals and students, offering valuable information for improving existing systems and developing new devices.