![]() Optionally, the sound may be played in a loop, which reduces the already modest CPU and battery usage by only generating the noise clip that's long enough to fill a loop (at the expense of using more RAM to store it, which normally is not a problem). In this app, the alpha value may be adjusted from 0 to 2 in small increments. The value of α=0 corresponds to white noise, or flat frequency spectrum, as described above α=1 corresponds to pink noise, or -3dB/octave frequency dependence, also as described above (in different words) α=2 to "red" or "brown" noise (which refers to Brownian motion rather than the color brown), or -6dB/octave frequency dependence. Similarly, in pink-colored light, the lower-frequency, longer-wavelength, redder components are stronger.Ī more general case is 1/f^α. In pink noise, the lower-frequency components are stronger, and the noise energy density is the same in every octave (or decade, or any logarithm of frequency). This is similar to white light, hence the term "white noise". In white noise, the noise energy density is constant throughout the frequency spectrum (at least in the range of interest). The terms "white" and "pink" noise refer to random signals with different spectral distributions. There are also some technical uses, such as testing speaker polarity. That way, at least if you picked the right type of noise and the earphones are comfortable, you will quickly stop noticing it with speakers, every time you move your head, your perception will change, and you will be reminded of the noise, which defeats the purpose. ![]() If you intend to stay awake, it's best to use it with headphones or earphones. Noise Machine can also be used with a speaker to help put babies (and adults) to sleep. This works remarkably well even at moderate volumes, and you will be able to concentrate or relax much more easily in noisy environments. When you are tired or irritable or are getting too distracted, you can let your brain rest by masking these sounds with noise that doesn't have a noticeable pattern. All of these sounds have certain patterns and aren't truly random in the mathematical sense. Loud conversations at a coffee shop where you are trying to read, crying babies on planes, background music that doesn't agree with your taste and a many other noises get into your brain and have to be processed. Use Noise Machine with a pair of earphones to mask distracting and annoying sounds and become at peace with the world. It does not play any pre-recorded sounds. It's stable, lightweight, and plays well with the phone's OS and other audio apps, and the UI is simple and functional. This app generates white, pink and red noise and lets you make subtle adjustments to noise color (spectral distribution).
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