Revisions to the extIPA chart

@article{Ball2017RevisionsTT,
  title={Revisions to the extIPA chart},
  author={Martin John Ball and Sara J Howard and Kirk A. Miller},
  journal={Journal of the International Phonetic Association},
  year={2017},
  volume={48},
  pages={155 - 164}
}
This paper describes changes to the extIPA (Extensions to the IPA) symbol set, the motivation for these changes, and areas where future changes by the IPA might be helpful to clinical transcribers. The extIPA symbol set was introduced some twenty-five years ago. Since that time, some minor changes have been introduced to the extIPA chart but no major rearrangement has been attempted. The 2010 Oslo meeting of ICPLA (International Clinical Phonetics and Linguistics Association) started a revision… 

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