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

Additional Resources:

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

For more videos, go to Youtube Apple Channel