Fig. 11From: Data driven filtering of bowel sounds using multivariate empirical mode decompositionHilbert-Huang power spectra of selected pIMFs for chosen parts of the examples and power distribution. a Cluster of bowel sounds in Fig. 9 (0.7–1.5 s). b Sneezing artifact in Fig. 10a (5.1–5.5 s). c Stroke artifact in Fig. 10b (0.82–0.92 s). d Movement artifact in Fig. 10b (6.5–9.5 s)Back to article page