Diagnostic Tools.
Stop guessing how you sound. Measure your acoustic output against established phonetic targets before you hire a coach.
Vowel Space Area Calculator
Calculate the geometric area of your vowel space based on F1/F2 formants of point vowels (/i/, /u/, /a/).
Rhotacism (R-Coloring) Index
Calculate the degree of rhoticity based on the F3 lowering effect.
Syllable Rate Calculator
Calculate your articulation rate (syllables per second).
Formant Tracker Proxy
Estimate F1/F2 targets based on height/backness.
Pitch Contour Match
Analyze expected intonation variance.
Vocal Fry Index
Calculate creaky voice probability based on Hz drops.
Nasality Score
Estimate anti-formant impact on nasality.
Glottal Stop Frequency
Count T-glottalization per 100 words.
Stress-Timing Ratio
Compare stressed vs unstressed syllable duration.
Intonation Declination
Calculate pitch drop over an utterance.
Pre-Fortis Clipping Calculator
Calculate vowel shortening before voiceless consonants.
Cot-Caught Merger Test
Analyze distance between /ɑ/ and /ɔ/.
Dark L Velarization
Estimate F2 lowering for syllable-coda /l/.