Table 4.

Averaged value of the lognormal parameters for older healthy speakers and speakers with laryngeal pathologies

	Formant estimation method
	“To formant (keep all)”			“To formant (sl)”
Parameter	Control (60–80)	LP (60–80)	p value	Control (60–80)	LP (60–80)	p value
$\overline{\mathrm{\Delta }{t}_{\text{o}}}$	0.069 ± 0.009	0.068 ± 0.008	0.64	0.068 ± 0.007	0.069 ± 0.007	0.50
NbLog	30 ± 8.8	33 ± 8.5	0.05	30 ± 8.2	33 ± 9.5	0.13
$\overline{\sigma }$	0.10 ± 0.04	0.12 ± 0.04	0.17	0.13 ± 0.04	0.14 ± 0.04	0.39
$\overline{\mu }$	− 1.47 ± 0.17	− 1.52 ± 0.14	0.18	− 1.58 ± 0.14	− 1.56 ± 0.14	0.53
$\overline{V_{\text{p}}}$	23.81 ± 4.5	23.82 ± 5	0.34	14.3 ± 1.95	13.86 ± 2.1	0.40
$\overline{D}$	1.20 ± 0.24	1.25 ± 0.25	0.39	0.76 ± 0.1	0.78 ± 0.1	0.71
SNR	18.58 ± 3.1	19.3 ± 3.7	0.52	18.14 ± 3.7	17.74 ± 3.5	0.88