I'm doing research on speech, but I'm not a linguist. Hopefully it won't be a silly question.
I have been reading a little on regional variations of formants, because in my research we use formant space as a measure of psychological distress (as per Scherer, S. et al., 2015. Reduced vowel space is a robust indicator of psychological distress: A cross-corpus analysis. In 2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, pp. 4789–4793.).
The research I've read mostly compares American English speakers with a standard formant space, however, we are based in Ireland and have Irish English speakers. I was wondering if the difference in accent can have an influence in the formant space.
To clarify, I understand that it has an influence on the vocal expression of the vowels, and I understand that a regional variation will mean that the same word is pronounced differently, but I think that the formant space itself should not be affected.