Move the cursor over the image to unfold the aliased components around the Nyquist frequency.

Notice now how the aliased component of the fifth harmonic component folds up to reveal a full, smooth harmonic relative to the fundamental, and the relationship of the other aliased harmonics is consistent with the non-aliased harmonics.

The vertical scale of this sonogram display is now twice the Nyquist frequency at 300 kHz, while retaining the same frequency spacing as the view on the previous pages.