Preparation of a masterbatch of diene elastomer and silica including preparing at least one silica dispersion in water; bringing into contact and mixing an elastomer latex and the aqueous silica dispersion in the presence of a metal salt having an at least divalent metal element, in order to obtain a coagulum; and recovering the coagulum and drying same in order to obtain the masterbatch. The inventive method includes inputting demand data and supply data, performing a first matching operation, collecting rematched demand data and rematched supply data, classifying the rematched demand data, and performing a second matching operation. The method includes the step of extracting information from the message. Air flows from here through air channels and into an open chamber leading to an outlet from the air silencerfilter.