Applications of Ultrasound in Speech Research

Abstract

This paper describes techniques employing diagnostic ultrasound for monitoring various physiological parameters within the head and neck during speech production. The theoretical principles underlying these techniques are discussed together with basic instrumentation systems that have direct application to studies in speech physiology. Examples of A-scope measurement of pharyngeal wall depth, B-scans of the trachea, time-motion displays of the moving lateral pharyngeal wall, and Doppler monitoring of vocal-fold velocity are included. It is concluded that diagnostic ultrasound can be a useful tool in speech research.