A noise barrier is a structure designed to reduce noise pollution from sources like highways, railways, or industrial areas. These barriers are typically made of materials such as concrete, wood, or metal and are placed between the noise source and residential or quiet areas. Their primary purpose is to absorb or deflect sound waves, making the environment more peaceful for nearby inhabitants. Noise barriers can vary in height and design, depending on the specific needs of the area. They are often used in urban planning to improve the quality of life for residents living close to busy roads or rail lines. Effective noise barriers can significantly lower noise levels, contributing to a healthier living environment.