Figure 12From: Classification of speech under stress based on modeling of the vocal folds and vocal tractSimulation results of fitting for neutral and stressed speech. Spectrums for original speech (top) and simulated speech with four cost functions ( C F 1 ‒ F 2 , Crms, CI-S, and CE-F) under neutral (left column) and stressed (right column) conditions. In this figure, C1 = C F 1 ‒ F 2 , C2 = Crms, C3 = CI-S, and C4 = CE-F.Back to article page