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. 2014 Sep;136(3):1225–1236. doi: 10.1121/1.4890649

FIG. 7.

FIG. 7.

(Color online) Details of the way harmonic complexes with a speech-shaped spectral profile were generated. The excitation level in unresolved regions was held constant, irrespective of F0, and a spectral tilt was added to the excitation pattern of average speech to increase the amplitude of low-order partials so as to compensate for the reduction in spectral density at high F0s.