Maintaining air quality is essential to the functions of our everyday. HVAC systems used in industrial and residential spaces and composed of ducts, dampers, silencers and others elements are necessary to keep high-quality and clean air indoor spaces. In this work, we studied the acoustic and aerodynamic parameters of the throttling dampers, which are an integral element of VAV and CAV systems in ventilation. The dampers under study varied fixing systems into channels. The two common fixes of blade damper - circular and square rods and three, non-disturb flow, specially constructed fixes for blade dampers were tested. The finite element method for simulations of the flow and acoustic parameters of the study objects was used. The experimental studies were performed in an anechoic room and a reverberation room. The simulation and experimental results were compared for throttling dampers with different fixing into the channel.