STAR Speech and Language Therapy

ExtIPA charts

Using the tabs at the top of the charts, you can select the pre-2015 or post-2015 extIPA charts. The former contains 36 disordered speech-sound items, and the latter augmented chart contains 66 items. Animations are available only for the pre-2015 extIPA chart items.

There are two MRI viewing options for both charts: MRI 1 and MRI 2.

  • MRI 1 was recorded in 2014 at Edinburgh Imaging Facility QMRI, with a frame rate of 7.5fps. Each file has been overdubbed with “clean” audio, recorded in a recording studio.
  • MRI 2 was recorded in 2022-2023 at the Edinburgh Imaging Facility, RIE, with a frame rate of 6.25fps and a 70% increase in image resolution, compared to MRI 1. Audio for the MRI 2 files was recorded in the MRI machine using an optical microphone and post-hoc noise cancelling. We aim to replace the MRI 2 audio with clean audio in the near future.
Video type:
Plosive t̪͆ d̪͆
Fricative median θ̼ ð̼θ̪͆ ð̪͆h̪͆ ɦ̪͆ʩ
Fricative lateral+medianʪ ʫ
Fricative narealŋ͋
Approximant laterall̪͆