Q: This white noise generator is based on the avalanche noise generated by a zener breakdown phenomenon. It is created when a PN junction is operated in the reverse breakdown mode./Q
You can visualize breakdown as chaos, as only chaos can create noise with constant power spectrum ..
More details here:
Building a Low-Cost White-Noise Generator
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What the heck is white noise? I studied it would be produced by combining all audio frequencies. How would combine all frequencies? It doesn't make any sense to me.
It is the other way round - if you analyse white noise it can be seen to contain all frequencies but that is not what causes it. Random collision of electrons is one cause. en.m.wikipedia.org/wiki/Johnson–Nyquist_noise
What the heck is white noise? I studied it would be produced by combining all audio frequencies. How would combine all frequencies? It doesn't make any sense to me.
U're right if we talk about audio frequency range and if that audio frequencies combination is meaningless to us (called noise)
you can expand above definition to general definition of white noise if including all frequency domain.
if you're acquainted with power spectral density remember that all frequency terms of the noise signal should have an equal power amplitude; it means that any arbitrary frequency interval with a fixed bandwidth contains an equal amount of power.