White noise machines are devices that produce a consistent sound, often resembling the noise of a fan or static from a television. They work by masking other sounds in the environment, which can help individuals sleep better, concentrate, or relax. The steady sound can create a calming atmosphere, making it easier to block out distractions. These machines are commonly used in homes, offices, and even in hospitals to promote a peaceful environment. Many models offer various sound options, including nature sounds or ambient music, allowing users to choose what best suits their preferences for relaxation or focus.