Application of Neural Network Algorithm Based on Principal Component Image Analysis in Band Expansion of College English Listening

<div>Standard English male-voiced signal based on PCA-NN. (a) Extended waveform of the standard English male-voiced signal. (b) Extended spectrogram of the standard English male-voiced signal.</div>

Computational Intelligence and Neuroscience

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Figure 7

Figure 7: Application of Neural Network Algorithm Based on Principal Component Image Analysis in Band Expansion of College English Listening 