Audio signal processing is a field of study that deals with the processing of sound signals, usually in the digital domain. This field encompasses various techniques and algorithms for modifying, analyzing, and synthesizing audio signals to achieve different objectives, such as noise reduction, equalization, compression, and filtering. Audio signal processing is commonly used in various applications, including music production, telecommunications, speech recognition, and hearing aids. Researchers in this area focus on developing new algorithms, methods, and technologies to improve the quality and efficiency of audio signal processing systems.