TRANSDUCER FOR MEASURING MANDIBULAR MOVEMENTS
Harvey Martin Sussman, Karl Ulrich Smith · The Journal of the Acoustical Society of America · 1970
A new transducing device that can record the dynamic movements of the mandible during speech is described. The transduction principle is based on the variable resistance changes of strain gauge elements bonded to a flexible metal beam attached to the mandible. The voltage output of the transducer is directly proportional to the lowering and elevation movements of the mandible and can be recorded on a standard oscillograph. The transducer itself is incorporated within a headgear apparatus so that the transducer moves with the head movements of the speaker and thus minimizes artifacts from this source. Calibration procedures and sample records are provided. The transducer is economically constructed and permits on-line flexibility for signal presentation.