Sound machines are devices designed to produce soothing sounds that help people relax, sleep, or focus. They often feature a variety of sound options, such as white noise, rain, ocean waves, or nature sounds. These sounds can mask background noise, creating a calming environment that promotes better sleep or concentration. Many sound machines are portable and can be used at home, in the office, or while traveling. Some models come with additional features like timers, volume control, and even built-in Bluetooth speakers for playing music. They are popular among individuals seeking relief from stress or insomnia.