A pilot study on the acoustic effects of a pseudo-palatal plate on speech: Implications for articulatory rehabilitation devices
Fig 5
Comparison results of vowel formant frequencies (F1, F2, and F3) for normal and wearing the palatal plate.
(A) Line plots of average formant values for five vowels (/a/,/e/,/i/,/o/,/u/) under two conditions: normal test (solid lines) and wearing the plate (dashed lines). (B) Linear regression analysis showing the correlation between formant values under normal and plate-wearing conditions; and (C) box plots comparing the distribution of F1, F2, and F3 between the two conditions.