I’ve made some improved measurements for nine Scottish English vowels and made them public on my academic homepage as pdfs.
There are two charts:
- One shows measurements taken from minimal pairs (here) – my friendly Scot, a female native speaker of Scottish English from the Central Belt, read aloud several sets of words which differed only in the vowel (eg heat, hit, hate, het, etc; coot, coat, cot, cut, etc). When the phonetic context is controlled like this, it makes the formant values much clearer to interpret
- The other shows measurements taken from the same speaker reading aloud a short story which was composed in such a way that it contains at least one example of most of the relevant vowels (shown here, alongside the minimal pair values for comparison)
I feel a lot happier with these charts, compared to the original one here cobbled together from single repetitions of words where the phonetic context was uncontrolled, and the subsequent one here which still suffers from lack of control although it made use of a greater number of tokens.