Recently I found a nice place that might be useful for you all. I Dose has a collection of free sounds that, they say, can help relax your stressed brain or make it more alert and improve the concentration level. You don’t have to buy it because I Dose provides the free streaming sound.
What should I do to try this out?
1. Sit or lay down in a comfortable place.
2. Wear your headphones.
3. Choose your desired state from the following list.
4. Close your eyes, and enjoy the sound 
