"Design and realisation of sound-proofing plants: Cladding: sound-absorbent walls/sound-isolating walls/cladding for open-field sound-proofing barriers and fixed and mobile reverberant barriers Doors and windows: RW20-30-40-50-60 doors and gates/acoustic windows pocket sliding doors Booths: machines/compressors/endothermic motors/turbines/pumps/operator cabs/monobloc cabs/booths explosion-proof booth test benches/acoustic booths pressurised sound-proof booths Silencers: passive for air ducts/cooling towers/chillers/active exhaust gases/vapour expulsion/environment treatment baffles/acoustic traps Chambers: anechoic chambers/semi-anechoic chambers/reverberation chambers/filtered acoustic chambers/pressurized acoustic chambers Engineering: cinemas/theatres/multipurpose halls/auditoriums/multipurpose rooms/radio and TV studios."