White noise for sleep, relaxation, and concentration. The free version is limited to pink, white, and brown noise. There is a $2.99 charge for extra features. which seem very limited.
More about this tinnitus solution
[From the app developer]
Sleep Mask is a white noise app that can be used as a sleep aid or distraction blocker. It produces high-quality white, pink, and brown noise sounds and some variations of these.
This is the FREE, ad-supported version of the Sleep Mask app.
What is White Noise?
White noise comprises many different frequencies of sound combined at equal intensity. Its name is analogous to white light, a combination of all the different colors of light in the visible spectrum.
What is Pink Noise?
Pink noise is a variation of white noise that emphasizes bass, or the lower frequencies of sound. It's called pink noise because if you were to do the same with the visible light spectrum, you would get a pinkish color.
What is Brown Noise?
Brown noise is a variation of white noise that emphasizes the lower frequencies of sound more than Pink noise. In the light analogy, this would yield a deep red color. But since the noise coincides with a mathematical model called Brownian motion, it is called Brown noise after the physicist Robert Brown.
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