F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
F01N1/00—Silencing apparatus characterised by method of silencing
F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
Systeme pour attenuer les ondes sonores contenues dans les gaz ou l'air d'evacuation des moteurs thermiques ou turbines ou materiels fonctionnant a l'air comprime