New Arc Stability Index for Industrial AC Three-Phase Electric Arc Furnaces Based on Acoustic Signals. - Juan Guerra-Serrano; Angel Sánchez-Roca; Guillermo González-Yero; Mario C. Sánchez-Orozco; Mercedes Pérez de la Parte; Emilio Jiménez Macías; Julio Blanco-Fernández (Sensors, 2020)