Adding Sinusoids

• Adding sinusoids having frequencies that are
  • the same, produces another sinusoid at that frequency;

  • different, produces a signal that is no longer sinusoidal;

  • integer multiples of a fundamental frequency $f_0$, produces a signal with period $1/f_0$.

  

• Sinusoidal components that are integer multiples of a fundamental frequency are called harmonics.