Table 6. Mean and Standard Deviation (SD) of male speakers' acoustic parameters.
| Acoustic parameters | Condition | |||||
| Masc | Neutral | Fem | ||||
| All vowels (N = 17) | mean | SD | mean | SD | mean | SD |
| F0mean | 103.2 | 11.9 | 107.6 | 13.78 | 152.3 | 37.4 |
| F0CV | 0.11 | 0.04 | 0.11 | 0.05 | 0.11 | 0.07 |
| F1 | 474.8 | 65.7 | 472.7 | 45.5 | 499.4 | 71.8 |
| F2 | 1579.2 | 110.4 | 1619.9 | 88.4 | 1682.4 | 96.8 |
| F3 | 2559.0 | 138.2 | 2609.1 | 126.5 | 2717.9 | 153.8 |
| F4 | 3369.6 | 239.8 | 3508.9 | 236.8 | 3743.9 | 237.5 |
| ΔF | 990.3 | 58 | 1022.4 | 55 | 1079.6 | 59.9 |
Mean and SD values (Hz) for: mean fundamental frequency (F0mean), coefficient of variation (F0CV), first four formant frequencies (F1–F4) and formant spacing (ΔF). “Masc” and “Fem” represent the masculinised and feminised conditions.