| convexHullArea | Calculate the area of a vowel space |
| indo | Formant frequency measurements for Indonesian vowels |
| normBark | Normalize formant frequency values using a variety of algorithms |
| normErb | Normalize formant frequency values using a variety of algorithms |
| normLobanov | Normalize formant frequency values using a variety of algorithms |
| normLog | Normalize formant frequency values using a variety of algorithms |
| normLogmean | Normalize formant frequency values using a variety of algorithms |
| normMel | Normalize formant frequency values using a variety of algorithms |
| normNearey1 | Normalize formant frequency values using a variety of algorithms |
| normNearey2 | Normalize formant frequency values using a variety of algorithms |
| normSharedLogmean | Normalize formant frequency values using a variety of algorithms |
| normVowels | Normalize formant frequency values using a variety of algorithms |
| normWattFabricius | Normalize formant frequency values using a variety of algorithms |
| plotVowels | Plot vowel formant data and a variety of derivative measures. |
| repulsiveForce | Repulsive force calculations and plots for vowel systems. |
| repulsiveForceHeatmap | Repulsive force calculations and plots for vowel systems. |
| repulsiveForceHeatmapLegend | Repulsive force calculations and plots for vowel systems. |
| vowelMeansPolygonArea | Calculate the area of a vowel space |