A Comparison of Imaging Techniques for the Investigation of Normal and Disordered Speech Production

Abstract

Recent years have seen the development of a set of speech imaging techniques that speech scientists have been able to use for the investigation of both normal and disordered speech production. The use of x-radiography techniques in speech science has become much less common due to the potential risks, so it is timely to review what alternatives are available. In this article, we describe three such approaches: magnetic resonance imaging (MRI), electromagnetic articulography (EMA), and ultrasound. The operating principles behind each technique are described, together with a review of relevant literature. Finally, we contrast the strengths and weaknesses of each imaging system in relation to their potential to be used in research and clinical applications with disordered speech.