The book "Analog and Digital Signal Filtration" by B. and . Parfenova is a fascinating and deep immersion in the world of signal processing, which will be an indispensable tool for both students and professionals in the field of electronics and telecommunications. In this work, the author masterfully combines theory and practice, offering the reader not only to comprehend complex concepts, but also to learn how to apply them to real-world problems. Signals are all around us, from simple sounds to complex radio signals. Signal filtering is a key area in data processing that allows you to highlight the necessary components and eliminate noise. Parfenov's book examines both analog and digital filtering methods, making it relevant to a wide audience. Readers interested in electronics, radio engineering, as well as students of technical specialties will find here useful knowledge that will help them in their studies and further careers. The author not only explains the basics of filtering theory, but also shares practical examples, which allows you to better assimilate the material. The book discusses in detail the different types of filters, their characteristics and application areas. Parfenov emphasizes the importance of choosing the right filter depending on the specific task, which makes his work especially valuable for engineers and developers. Topics raised in the book range from the fundamentals of signal theory to complex digital filtering algorithms. The reader will be able to learn about the methods of designing filters, their implementation and optimization, as well as about current trends in the field of signal processing. In. and . Parfenov shares his experience and knowledge, which makes the book not only a textbook, but also a real guide to the world of signals and their processing. The author's style is distinguished by clarity and accessibility, which allows even beginners in the field of electronics to easily assimilate complex concepts. In. and . Parfenov is not only the author of this book, but also a specialist with extensive experience in the development and implementation of signal processing technologies. His other well-known works are also noteworthy as they continue to develop the themes touched upon in Analog and Digital Signal Filtration. This book will be of interest not only to undergraduate and graduate students, but also to practicing engineers working in the field of communications, audio engineering and other related disciplines . It will be an excellent addition to the library of any specialist who seeks to deepen their knowledge and skills in the field of signal processing. If you are looking for literature on the topics of signal filtering, data processing or electronics, then “Analog and digital signal filtering” and . Parfenova is exactly what you need. Do not miss the opportunity to discover a world where science meets practice, and theory becomes the basis for innovative solutions. This book is your reliable companion in the study and application of filtering methods that will help you become a real professional in your field.