Vowels of American English Here the vowels of american English are plotted according to the sound. "Low"refers not only to the position of the tongue bul he o point of primary obstruction by the tongue in the articulation of th Jaw as well high Juw front e o a E awt a k a and L l, a central owel before r lowVowels of American English • Here the vowels of American English are plotted according to the point of primary obstruction by the tongue in the articulation of the sound. "Low" refers not only to the position of the tongue but the jaw as well