I read $y=A\sin(2\pi ft)$, where $A$=Amplitude, $f$=Frequency, $t$=Time and $y$=$Y$ position of the wave.
Since natural frequencies only take the most effect when they are close to the frequency. How would one natural frequency and several natural frequencies affect the equation?
Would I be correct in thinking it's something to effect of:
where Y_Postion is the first equation and NaturalFrequency is similar to the first equation but with a low amplitude?