Acoustic physics is a branch of physics that deals with the study of sound waves and their behavior in various mediums. It involves the study of the generation, propagation, and reception of sound waves, as well as the effects of these waves on different materials and structures. Acoustic physics is used in a wide range of applications, including the design of soundproofing materials, the development of medical imaging techniques such as ultrasound, and the design of musical instruments and audio equipment. Researchers in this field use mathematical models and experimental techniques to understand the properties of sound waves and how they interact with different materials.