Table 3. Results of broadband and narrowband spectrograms.

	Sub 1	Sub 2	Sub 3	Sub 4	Sub 5
Gender	M	M	F	M	M
Age (years)	24	24	26	19	26
Tracing intensity of F	I	I	W	I	I
Tracing intensity of high frequencies	I	N/C	W	I	I
Tracing intensity in the whole spectrum	I	N/C	W	I	I
Antiresonance/ damping immediately above F1	I	I	W	I	I
Antiresonance/ damping in the whole vocal spectrum	I	I	W	I	I
Definition of F	N/C	I	N/C	I	I
F3 and F4	Appearance of F3 and F4	N/C	Disappearance of F3	Appearance of F3 and F4	Disappearance of F3
Definition of harmonics	N/C	N/C	N/C	I	I
Presence of noise	N/C	N/C	N/C	N/C	N/C
Regularity of tracing	I	N/C	N/C	N/C	I

Abbreviations: F, female; F, formant; I = improvement; M, male; N/C, no change; W, worsening.