y1 (t) = Asin(2nfit) (EQ 3) V2 (t) = Bsin(2nf,t) (EQ 4) Waves add to one another using the superposition principle - the linear combination of two or more waves . Then a sound consisting of these two waves would have the form of the simple mathematical addition of EQ 3 and 4. 2.3.1 Assuming identical amplitudes, add the two waves in EQ 3 and 4