Again, move the mouse over the sonogram image to highlight the aliased components. Notice how they appear at an opposite slope relative to the non-aliased call components. Also notice how the uppermost fifth harmonic has both a real and aliased component. Now imagine folding the pink aliased components upward along an axis described by the 150 kHz Nyquist frequency at the top of the sonogram panel. To see what this looks like, continue on to the next page.