J. Tam, J. Huissoon, University of Waterloo, Waterloo, ON, Canada

Summary: Investigation concerning information available in arc acoustics during GMA welding is presented. Specifically, identification of characteristic descriptors associated with spray-transfer tuning and their correlation with observable physical events are examined. Experiments to evaluate the extent of acoustic feedback reliance by human welders are conducted using time-delayed and band-passed acoustic signals during welding.