This is a pure deep relaxation noise made from stretching deep brown noise. It is great for focusing and even getting to sleep. It works best when your speakers have a wide range with a subwoofer or a pair of headphones but this noise one has also been equalized to work with many phones and tablets to some degree. It should also be great for aiding in meditations and in drowning out other annoying noises that may be in your current environment.
Pure Noise Playlist: https://www.youtube.com/playlist?list=PLsO8fxO6PnReKkEWSx-4g0RNaWwmKB6Cf
Super Deep Brown Noise: