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The first and second formants when you make an "ee" vowel sound are approximately 270 Hz and 2300 Hz. The speed of sound in your vocal tract is approximately 350 m/s. If you breathe a mix of oxygen and helium (as deep-sea divers often do), the speed increases to 810 m/s .
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The first and second formants when you make an "ee" vowel sound are approximately 270 Hz and 2300 Hz...
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