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. Author manuscript; available in PMC: 2011 Nov 9.
Published in final edited form as: J Voice. 2008 Apr 14;23(3):283–290. doi: 10.1016/j.jvoice.2007.10.004

Figure 4.

Figure 4

Distributions of perturbation analysis in normal and esophageal voice signals. (a) Correlation dimension (D2); (b) Second-order entropy (K2); (c) Standard deviation of D2 (SDD2) (d) Standard deviation of K2 (SDK2).