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

<div>English male-voiced sound signal based on the PCA-NN model. (a) Sound signal waveform of English male-voiced sound signal after expansion. (b) Spectrogram of English male-voiced sound signal after expansion.</div>

Computational Intelligence and Neuroscience

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Figure 5

Figure 5: Application of Neural Network Algorithm Based on Principal Component Image Analysis in Band Expansion of College English Listening 