Table 3: Results of the acoustic analysis of the vowel /æ/ samples in children implanted before or at the age of 4 years (N = 15) and children implanted after the age of 4 years (N = 15).
Acoustic parameter | Implanted at the Age < 4 years (mean/S.D.) | Implanted at the Age > 4 years (mean/S.D.) | p |
f0 before CI | 303.73/75.69 | 288.19/67.53 | 0.550 |
f0 6 months after CI | 317.77/43.07 | 288.19/67.53 | 0.018 |
f0 12 months after CI | 311.85/70.08 | 288.19/67.53 | 0.008 |
f0 24 months after CI | 315.07/49.69 | 270.58/85.73 | 0.112 |
JIT before CI | 3.91/1.64 | 1.17/0.62 | 0.000 |
JIT 6 months after CI | 2.01/1.47 | 1.33/0.95 | 0.266 |
JIT 12 months after CI | 2.01/1.47 | 1.33/1.11 | 0.439 |
JIT "24 months" after CI | 0.88/0.53 | 0.89/0.54 | 0.962 |
SH before CI | 0.88/0.53 | 3.49/1.24 | 0.000 |
SH 6 months after CI | 4.89/1.98 | 3.65/1.25 | 0.113 |
SH 12 months after CI | 4.89/1.98 | 3.24/1.43 | 0.024 |
SH "24 months" after CI | 3.23/1.51 | 2.89/0.81 | 0.530 |
NHR before CI | 0.23/0.12 | 0.11/0.02 | 0.530 |
NHR 6 months after CI | 0.23/0.29 | 0.12/0.01 | 0.530 |
NHR 12 months after CI | 0.15/0.04 | 0.13/0.04 | 0.188 |
NHR "24 months" after CI | 0.11/0.01 | 0.11/0.02 | 0.297 |