[time-nuts] Examples of noise processes

[jimlux]

On 3/15/19 7:03 AM, John Ackermann N8UR wrote:
> Hi --
> 
> For a presentation on basic time-nuttery, I'd like to find 
> non-oscillator examples of the various noise processes -- white PM, 
> flicker PM, white FM, flicker FM, random walk.  (I'm not sure if FM and 
> PM have any relevance outside oscillators, though.)



You're looking for random statistical processes that have the right 
power law?

What about brownian motion? 1/f^2


1/f (pink noise) occurs in lots of natural systems - for non oscillator 
(heart rates have 1/f, but they're oscillators, right) - individual 
neuron firing rates often show a 1/f characteristic.

Thermal noise is white

Financial systems (i.e. stock prices) often have power law variations 
from transaction to transaction or in aggregate.




> 
> The idea is to make the noise processes more relatable.
> 
> Anyone want to share?
> 
> Thanks,
> John
> 
> 
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