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. 2019 Aug 14;10:1813. doi: 10.3389/fpsyg.2019.01813

FIGURE 1.

FIGURE 1

Simplified vowel chart displaying the long Norwegian vowels used in the NSRT, plotted according to the two first formant frequencies, F1 and F2 [modified after Kristoffersen, 2000 (2000, p. 17)].