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

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

Computational Intelligence and Neuroscience

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Figure 6

Figure 6: Application of Neural Network Algorithm Based on Principal Component Image Analysis in Band Expansion of College English Listening 