Table 7 Correlation between acoustic parameters and SSI3 in the stuttering group

1-Prolonged /a/vowel

Fundamental Frequency (F0)

−0.18 ^a

0.27

Jitter

0.43 ^b

0.006*

Shimmer

0.47 ^b

0.002*

Harmonic to Noise ratio (H/N ratio)

−0.23 ^a

0.15

2-Automatic speech

Fundamental Frequency (F0)

−0.19 ^a

0.24

Jitter

0.05 ^a

0.77

Shimmer

0.31 ^a

0.06

Harmonic to Noise ratio (H/N ratio)

−0.13 ^a

0.44

3-Spontaneous speech

Fundamental Frequency (F0)

−0.23 ^a

0.16

Jitter

−0.19 ^a

0.25

Shimmer

0.13 ^b

0.43

Harmonic to Noise ratio (H/N ratio)

−0.10 ^a

0.52