The height of the jaw increases as you pronounce the vowel sounds in the words of this GIF:
The jaw height changes depending on the vowel you are articulating. Enter vowel chart, the secret weapon for perfecting your English accent on the condition that your tongue height and position hit the coordinates:
The vowel chart is a cross-section of your vocal tract. In other words, it shows the required height and position of your tongue for producing various vowel sounds. This is the ultimate tool for being mindful of the highly-discarded language learning super tool- the tongue! The vowel chart should be called an instruction manual for the tongue.
“The vowel chart should be considered as an instruction manual for the tongue.“Teacher Matthew/Matty, Sorry For My Good English.
If you want to pronounce the /i:/ correctly in ice cream, look at the coordinates on the map, so to speak. Watch the video: