Table 6.
Correlations between perceptual voice ratings and acoustic measures.
| Sustained /a/ |
Continuous speech |
|||||||
|---|---|---|---|---|---|---|---|---|
| Feature | Roughness | Breathiness | Strain | Severity | Roughness | Breathiness | Strain | Severity |
| Jitter | .79*** | .59*** | .66*** | .71*** | — | — | — | — |
| Shimmer | .77*** | .65*** | .60*** | .71*** | — | — | — | — |
| HNR | −.81*** | −.59*** | −.64*** | −.69*** | — | — | — | — |
| CPP | −.53*** | −.74*** | −.45** | −.67*** | .01 | −.19 | .33* | .15 |
| CPP SD | .68*** | .37** | .64*** | .61*** | −.26 | −.40** | −.03 | −.13 |
| L/H ratio | −.17 | .01 | −.22 | −.09 | .15 | .31* | .37** | .32* |
| L/H ratio SD | .32* | .20 | .40** | .33* | −.20 | −.07 | −.27 | −.20 |
| CSID | .78*** | .63*** | .69*** | .75*** | .24 | .03 | −.19 | −.05 |
Note. Em dashes indicate that there are no values to report for these features (i.e., jitter, shimmer, and HNR) for the continuous speech task because they cannot be calculated from continuous speech. HNR = harmonics-to-noise ratio; CPP = cepstral peak prominence; CPP SD = CPP standard deviation; L/H ratio = low–high spectral ratio; L/H ratio SD = L/H ratio standard deviation; CSID: Cepstral Spectral Index of Dysphonia.
*
p ≤ .05.
**
p ≤ .01.
***
p ≤ .001.