By virtue of their electrical properties, tubes generate a special waveform when they're saturated, which is why tube engineering has tremendous tonal advantages over solid state or DSP solutions, particularly for crunch and lead sounds. Tubes enter the saturation zone gradually or softly, which lends tube-driven tone its trademark yet totally unique character.
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So is this the same thing as when you have been in a noisy place and then go into a quite room for example when you go to bed. I sometimes find i can here loads of strange background noise then. It usually goes after a while. I dont know if this is the same thing or a similar thing !
