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Mean (± s.d.) formant frequencies (Hz) for vowels measured in continuous speech from laryngeal and electrolarynx sources.
| Vowels | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Source | /ɑ/ | /æ/ | /e/ | /i/ | /u/ | /o/ | |||||||
| Laryngeal | F1 | 608 | (±67) | 583 | (±129) | 398 | (±67) | 276 | (±26) | 425 | (±48) | 532 | (±74) |
| F2 | 1123 | (±131) | 1533 | (±209) | 1879 | (±196) | 2133 | (±119) | 1541 | (±302) | 1159 | (±127) | |
| Electrolarynx | F1 | 728 | (±77) | 732 | (±106) | 580 | (±84) | 416 | (±64) | 425 | (±66) | 532 | (±61) |
| F2 | 1185 | (±96) | 1570 | (±123) | 1849 | (±175) | 2104 | (±152) | 1370 | (±241) | 1161 | (±90) | |
