Phase perturbation is the shifting, from whatever cause, in the phase of an electronicsignal. The shifting is often quite rapid, and may appear to be random or cyclic. The phase departure[?] in phase perturbation usually is larger, but less rapid, than in phase jitter.
Phase perturbation may be expressed in degrees, with any cyclic component expressed in hertz.
... 27.7% of all households are made up of individuals and 14.5% have someone living alone who is 65 years of age or older. The average household size is 2.45 and ...