Table 4: Results of the acoustic analysis of the vowel /æ/ samples performed before 6 and 12, months after the implantation in children implanted before or at the age of 4 years (N = 15).

Acoustic parameter Before CI (mean/S.D.) 6 months after CI(mean/S.D./p) 12 months after CI(mean/S.D./p)
f0 (Hz) 303.73/75.69 317.77/43.07/0.178 311.85/70.08/0.599
JIT (%) 2.89/1.87 2.01/1.47/0.003 1.52/1.25
SH (%) 6.27/3.78 4.89/1.98/0.004 4.14/1.98
NHR 0.18/0.11 0.18/0.23 0.11/0.01/0.021