| Period values greater than 2, or greater than 1 where formant correction is applied, lead to unnatural results and are only useful for the creation of special effects. |
| In the past, coarticulation has been studied using only limited data sets and using acousticphonetic methods such as formant analysis. |
| Thus, the placement of unrounded vowels to the left of rounded vowels on the IPA vowel chart is reflective of their position in formant space. |
| It was in these papers that the term formant was first introduced. |
| Vowel backing was measured by changes in second formant frequency. |
| As with vowel height, however, it is defined by a formant of the voice, in this case the second, F2, not by the position of the tongue. |
