## vowelchart_variation2.jpg

The image is a phonetic chart used for British English vowels. It's a scatter plot that shows the frequency of first formant (F1) on the vertical axis and the frequency of second formant (F2) on the horizontal axis, both measured in Bark units. The Bark scale is logarithmic, which means it compresses high frequencies more than low ones.

The chart includes various vowel sounds represented by circles with labels inside them. These labels correspond to different phonetic transcriptions used in linguistics and speech science. For example:

- "beat" (iː) is located at a higher F1 frequency compared to other vowels.
- "bit" (ɪ) has the lowest F1 value among all the vowels shown.
- "bet" (ɛ̃) is positioned slightly lower than "beat."
- "bat" (æ) is near the bottom of the chart, indicating it has the lowest F2 values.

The circles are labeled with phonetic symbols that represent different vowel qualities. Some examples include:

- "iː" for a high front unrounded vowel.
- "ɪ" for a mid front unrounded vowel.
- "ɛ̃" for a low front rounded vowel.
- "æ" for a central open-mid front unrounded vowel.

The chart also includes some words that are used to demonstrate the positions of these vowels. For example:

- "pool" (uː) is shown near the top right, indicating it has high F1 and F2 values.
- "book" (ʊ) is positioned slightly lower than "pool."
- "caught" (ɒ) is located at a lower frequency on both axes.

The chart also includes some additional labels such as "bird," "hot," and "fast," which are used to illustrate the positions of these vowels in relation to each other. The data for this chart comes from Deterding's work published in 1997, as indicated at the bottom right corner of the image.

The chart is a useful tool for understanding how different vowel sounds can be distinguished based on their F1 and F2 frequencies. It helps linguists and speech therapists to analyze and teach pronunciation by showing where each sound falls within the range of possible vowel qualities in British English.

This description was generated automatically from image files by a local LLM, and thus, may not be fully accurate. Please feel free to ask questions if you have further questions about the nature of the image or its meaning within the presentation.