Table 2 Summary of mean (standard deviation) for aggregate vocal effort ratings (VER) and vocal performance measure including mean speaking fundamental frequency (F0), standard deviation of the speaking fundamental frequency (F0sd), speech level (SL), speech level (SLsd), smoothed cepstral peak prominence (CPPs).

From: Voice fatigue subtyping through individual modeling of vocal demand responses

 

VER

F0 (ST)

F0sd (ST)

SL (dB)

SLsd (dB)

CPPs (dB)

PRE

17.1 (13.9)

\(0^{\hbox {a}}\)

1.91 (0.83)

56.2 (5.3)

3.56 (0.3)

13.4 (1.4)

5 min

34.7* (17.7)

2.72* (1.9)

2.3* (0.76)

67.0* (4.9)

3.78* (0.2)

13.6 (1.0)

10 min

36.9* (19.1)

3* (1.96)

2.44* (0.77)

67.5* (4.8)

3.77* (0.2)

13.5 (1.1)

15 min

40.3* (20.5)

2.97* (1.92)

2.49* (0.73)

67.6* (4.8)

3.82* (0.2)

13.5 (1.1)

20 min

42.6* (22.5)

3.06* (1.92)

2.52* (0.81)

67.5* (4.7)

3.81* (0.2)

13.5 (1.0)

25 min

45.4* (24.7)

3.17* (2.04)

2.53* (0.78)

67.4* (5.1)

3.8* (0.2)

13.7 (1.0)

30 min

47.6* (28.2)

3.04* (2.02)

2.51* (0.76)

66.9* (5)

3.79* (0.2)

13.6 (0.9)

POST

39.8* (27.8)

0.83* (1.34)

2.16 (0.81)

57.5 (5.1)

3.63* (0.3)

13.4 (1.4)

  1. \(^{\hbox {a}}\)Since the F0 from PRE was used as the reference for semitone (ST) calculations, the value is 0 by definition. *\(p\) < 0.05 for the significance of the difference between time point and PRE.