Listen to the sound of the world for concentrating at work

Sometimes it’s quite noisy at the office or your workplace and you want to put your headphone on and listen to other things than the noise. But what to listen? I can’t listen to the music because it makes me neglected. I found out a website called Defonicthat has quite a lot of natural sound which can help you from blocking disturbing noises and concentrating on your works. It also has mobile applications you can download and use offline.