White Noise

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Random noise or audio rate voltage which has equal energy per Hertz in the 20 - 20,000 Hertz range.

 

Rain, a shower, a waterfall, etc. are natural examples which resemble white noise. WHite noise tends to have a distinct high frequency colour to humans as half the energy is in the highest octave which we can perceive: 10,000-20,000 Hertz.

 

white noise