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. Author manuscript; available in PMC: 2013 Sep 1.
Published in final edited form as: J Voice. 2012 Apr 18;26(5):566–576. doi: 10.1016/j.jvoice.2011.09.006

Figure 7.

Figure 7

Comparison of the association between acoustic indices and mean perceptual rating of voice quality in patients with vocal fold scar and sulcus vocalis and controls. A: Jitter. B: Shimmer. C: Signal-to-noise ratio (SNR). D: Correlation dimension (D2). Type 1 signals are represented by purple open circles; type 2 signals are represented by green closed circles; type 3 signals are represented by red closed circles. Correlation coefficients (r) are presented for type 1 signal data only (n = 23) and for all data (n = 46).