Wrench, Alan A.Cleland, JoanneScobbie, James M.2018-06-292018-06-292011-08Wrench, A., Cleland, J. & Scobbie, J. (2011) An ultrasound protocol for comparing tongue contours: upright vs. supine, Proceedings of 17th ICPhS, Hong Kong, pp. 2161-2164.https://eresearch.qmu.ac.uk/handle/20.500.12289/2507A study is described that employs ultrasound to measure the effects of gravity on production of vowels. The materials are designed to encourage consistent production over repetitions. A recording and analysis protocol is described which allows for correction for probe movement or rejection of data where correction is not possible. Results indicate a slight superior and posterior displacement of the tongue root in supine posture, consistent with a shift in the support structure of the tongue.2161-2164article