What is a vowel chart and how does it represent vowel sounds using tongue height and frontness/backness?

oe1216454, let's knock this out. This image displays a vowel chart, also known as a vowel trapezium or vowel quadrilateral. It is a diagram used in phonetics to represent the positions of the tongue when producing different vowel sounds. The vertical axis of the chart indicates tongue height*: Vowels at the top (e.g., i, u) are high* (or close) vowels, meaning the tongue is close to the roof of the mouth. Vowels at the bottom (e.g., a, ) are low* (or open) vowels, meaning the tongue is low in the mouth. The horizontal axis indicates tongue frontness or backness*: Vowels on the left (e.g., i, e, , a, ) are front* vowels, meaning the tongue is positioned towards the front of the mouth. Vowels on the right (e.g., u, o, ) are back* vowels, meaning the tongue is positioned towards the back of the mouth. The symbols shown (e.g., i, u, e, o, , , a, , I, ) are from the International Phonetic Alphabet (IPA), each representing a distinct vowel sound. The other written words like "mfini mfini", "Anim", and "Akiji anakukuruma" appear to be additional notes or labels, possibly in another language, related to the chart's dimensions or examples. Send me the next one 📸