  1/f noise at arbitrary low frequences is the way of existence of
irreversibility in thermal motion governed by reversible laws of mechanics.
This statement not once was confirmed in statistical mechanics beyond its
traditional kinetical roughenings. Here we point out that in case of quantum
statistical mechanics in principle it is sufficient to avoid such the
roughening as the "Fermi golden rule". This means taking into account the
time-energy uncertainty principle (time-frequency one in classical limit) and
thus uncertainties in characteristics of real collisions and scatterings of
particles and/or quanta. We consider the resulting "pseudo-kinetics" and
demonstrate how it produces quantum 1/f-noise
