![]() Effects of tinnitus retraining therapy with different colours of sound. Grey noise has a low intensity in the middle frequencies and increases intensity at both ends of the audible acoustic spectrum, yielding a U-shaped curve.īarozzi S, Ambrosetti U, Callaway SL, Behrens T, Passoni S, Bo LD.This makes the higher frequencies more prominent. Violet noise is similar to blue noise as it has intensity increasing with frequency, though mirroring the step size of brown/red noise (6 decibels per octave).Blue noise mirrors pink noise in the size of steps (3 decibels per octave), except intensity increases with frequency.People report brown noise to the liking of rain or running water in a shower. Brown noise (also called red noise) is similar to pink noise, except that the intensity decays more rapidly as frequency increases (6 decibels per octave), giving it a more rumbling character.The sound of wind or a waterfall is similar to pink noise. This has the result of emphasizing lower pitches and sounding ‘softer’ or ‘less harsh’ than white noise. Pink noise contains the same range of frequencies, but the intensity decreases as frequency increases (by 3 decibels per octave).Think static that comes from a radio or television. ![]()
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