Noise level refers to the intensity of sound in a given environment, typically measured in decibels (dB). It helps to quantify how loud or quiet a space is, which can affect comfort, communication, and overall well-being. Common sources of noise include traffic, machinery, and conversations. Understanding noise levels is important in various settings, such as workplaces, schools, and residential areas. High noise levels can lead to stress and hearing loss, while low noise levels can promote concentration and relaxation. Tools like sound level meters are often used to measure and monitor these levels effectively.