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

<div>English male-voiced original sound signal. (a) Original sound signal waveform of the English male voiced sound signal. (b) Spectrogram of English male voiced original sound signal.</div>

Computational Intelligence and Neuroscience

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Figure 4

Figure 4: Application of Neural Network Algorithm Based on Principal Component Image Analysis in Band Expansion of College English Listening 