English examples:

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Narrowband Spectrograms (at left) and spectral cross sections (at right) of unprocessed English speech, and the two versions of sine-wave speech. The spectral slices are taken at the time value of 0.4 s. This figure depicts the sentence The ladder’s near the door. Note in the spectral sections how the multiplicity of harmonics varying in overall height in the unprocessed speech has been simplified down to three sinusoidal components. Noise-vocoding the sine-wave speech broadens these components out so that they have a spectral shape more similar to speech, but still lacking harmonics.