title: An accurate data collection method for spatial motion using a sonic digitizer.
abstract: An accurate collecting method for spatial displacement data utilizing a sonic digitizer which works electronically and acoustically is described. The sequence of the operation of the digitizer system is explained. As an application, the study of elbow flexion-extension is presented. Finally, operational precautions for using this system are discussed.
mesh_terms: D001696:Biomechanical Phenomena; D004550:Elbow / Q000502:physiology; D049671:History, 18th Century; D006801:Humans; D009068:Movement; D010827:Physiology / Q000295:instrumentation*; D013016:Sound