A white noise machine is a device that produces a consistent sound, often resembling the noise of a fan or static. This sound helps to mask other noises in the environment, creating a more peaceful atmosphere. Many people use these machines to improve sleep quality, enhance focus, or provide comfort in noisy settings. These machines can be particularly beneficial for individuals who struggle with insomnia or are sensitive to sudden sounds. They come in various forms, including portable devices and smartphone apps, making them accessible for home use or travel.