Research Article
Nonlinear Analysis of Auscultation Signals in TCM Using the Combination of Wavelet Packet Transform and Sample Entropy
Table 3
SampEn values for the subbands’ coefficients in first, second and third levels with significant differences.
| Frequency band (kHz) | Qi deficiency | Yin deficiency | Healthy | P value | Mean | SD | mean | SD | Mean | SD |
| 4–8 | 1.303 | 0.346 | 1.266 | 0.346 | 1.490 | 0.374 | 0.011 | 4–6 | 1.356 | 0.356 | 1.304 | 0.358 | 1.567 | 0.357 | 0.005 | 6–8 | 1.428 | 0.312 | 1.410 | 0.289 | 1.632 | 0.220 | 0.002 | 3-4 | 1.104 | 0.266 | 1.131 | 0.306 | 1.256 | 0.296 | 0.035 | 4-5 | 1.359 | 0.364 | 1.319 | 0.406 | 1.582 | 0.362 | 0.005 | 5-6 | 1.406 | 0.334 | 1.412 | 0.339 | 1.636 | 0.332 | 0.003 | 6-7 | 1.541 | 0.292 | 1.524 | 0.313 | 1.755 | 0.251 | 0.001 | 7-8 | 1.600 | 0.266 | 1.544 | 0.279 | 1.703 | 0.269 | 0.044 |
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