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Vowel signal alteration in the masked conditions
| Surgical mask |
Cotton mask |
Signal |
|||||
|---|---|---|---|---|---|---|---|
| Vowel | F1 | F2 | Duration | F1 | F2 | Duration | |
| /i/ | Not altered | ||||||
| /e/ | * | * | * | Altered | |||
| /a/ | * | * | Altered | ||||
| /o/ | Not altered | ||||||
| /u/ | * | Altered | |||||
* = significant differences from the no mask condition
