The video above shows a peaceful hillside, with the wind blowing the trees and the soothing sounds of birds chirping. Would you guess that scene is from Grand Theft Auto 5? Turns out video games have a ton of scenes perfect for ambient noise.

iOS: There is a surprisingly long list of excellent ambient noise apps on the iPhone, but if you're looking for one that provides a nearly infinite amount of variety, White Noise+ is worth a look.

White Noise, one of the better ambient noise apps out there, has always let you record your own personal sound loops to listen to. But now, you can upload and share your collection of ambient recordings with everyone.

You might find it hard to focus when it's too quiet. As this video from SciShow explains, that's because when it's quiet, a single sound is accentuated, diverting your attention. White noise can help with that, and there are other colours of noises, too, depending on the frequency.