Background sounds like bright noise, dark noise, ocean, or rain play continuously while you use your iPhone to mask unwanted noise and help you focus.
To learn more about this topic, visit the following article:
Use Background Sounds to play ambient noise: https://apple.co/2XgmfJO
Contact Apple Support for iPhone: http://apple.co/iPhone
To subscribe to this channel: https://www.youtube.com/c/AppleSupport
To download the Apple Support app: http://apple.co/2hFtzIv
Apple Support on Twitter: https://twitter.com/AppleSupport