An automatic guided system transfers scrap glass resulted from at least one scrap glass source of a clean room to a scrap exit. In at least one embodiment, the apparatus includes an array of acoustic sensors respectively positioned at a variety of respective locations within the facility, where each of the respective acoustic sensors detects respective sounds arriving at the respective sensor from the system, including the piece of equipment. The structures according to the invention are particularly intended for use as electrodes for the electrolysis of liquid effluents, as electrode supports for electrochemical generators, as catalyst supports, filtration media, phonic insulation, electromagnetic and nuclear protection structures, or for other applications.