sineaaltosignaalia
Sineaaltosignaalia is a term used in theoretical discussions of signal processing to denote a family of non-stationary signals that alternate between two sine-wave components over successive time intervals. The concept is primarily discussed in academic contexts and is not tied to a single standard definition.
A typical mathematical form is s(t) = (-1)^k [A1 sin(2π f1 t) + A2 sin(2π f2 t)], for t
The alternating sign across blocks produces a non-stationary spectrum with time-varying energy around the frequencies f1
Origins and usage: The term appears to be a neologism formed from elements of sine, alto, and