Table 5.

Descriptive statistics of acoustic features.

	Sustained vowel				Continuous speech
Feature	M	SD	Min	Max	M	SD	Min	Max
Jitter	0.007	0.010	0.001	0.072	—	—	—	—
Shimmer	0.050	0.034	0.008	0.201	—	—	—	—
HNR	19.473	5.862	0.132	32.591	—	—	—	—
CPP	11.364	2.576	1.926	15.437	5.240	1.412	1.952	9.223
CPP SD	1.037	0.731	0.367	3.040	3.525	0.652	1.851	5.043
L/H ratio	35.308	5.372	23.312	44.819	32.735	5.781	19.950	42.022
L/H ratio SD	1.734	0.722	0.796	4.944	9.421	1.743	4.873	13.798
CSID	16.540	18.870	−13.669	81.335	6.340	15.390	−24.052	42.160

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. Min = minimum; Max = maximum; 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.