You might already be familiar with white noise, if you prefer the sound of a whirring fan to block out distractions at work. Maybe you even use pink noise, like the gentle crash of ocean waves ...

An iPhone user has shared a 'most useful' tip to access a 'hidden' sound machine feature on her mobile - and people are now praising the hack as perfect for sleep and relaxation.

To begin enjoying the benefits of Background Sounds, follow these simple steps: Open Settings. Tap Accessibility. Select Audio & Visual. Choose Background Sounds. Activate the feature by toggling the ...