An Electromagnetic Method for Transducing Jaw Movements during Speech

A new method for transducing movements of the mandible is described. The equipment employed includes a three‐coil magnetometer system that enables real‐time recording of jaw movements without encumbrance to natural articulation. Theoretical principles underlying the method are discussed, as are procedures for using and calibrating the equipment. Examples of one‐ and two‐dimensional measurements are presented, the latter being related to displacement pathways followed during nonspeech gestures of the mandible. Beyond the specific method described, it is concluded that magnetometers have attractive potential as a research tool in speech physiology.