White noise is a type of sound that contains a mix of all audible frequencies played together at the same intensity. It resembles the static noise you might hear on an untuned radio or television. This consistent sound can help mask other noises, making it useful for creating a calming environment. Many people use white noise machines or apps to aid sleep, improve focus, or reduce distractions. The steady sound can promote relaxation by drowning out sudden noises, which is particularly beneficial in busy or noisy settings.