Acoustic metamaterials are engineered materials designed to control sound waves in ways that natural materials cannot. They are made up of structured components that manipulate sound properties, allowing for unique effects like sound insulation, focusing, or even sound cloaking. These materials can be used in various applications, including noise reduction in urban environments, improving audio technology, and enhancing ultrasound imaging in medical diagnostics. By altering the way sound interacts with the material, acoustic metamaterials open up new possibilities in sound management and manipulation.