Fig. 5
From: Multi-channel lung sounds intelligent diagnosis of chronic obstructive pulmonary disease
Channels and features selection results. A Accuracy of mild COPD and moderate + severe COPD classification using the different number of channels. B Accuracy trend of mild COPD and moderate + severe COPD classification using the different feature quantities. C Accuracy of moderate COPD and severe COPD classification using the different number of channels. D Accuracy trend of moderate COPD and severe COPD classification using the different feature quantities