The function of the Expansion Chamber Attenuator, ECA, is to reduce the noise level in the system. It is mounted between the pump and the valve. The component that generates the most noise in the system is the pump, which causes the ECA’s dependency. The function of the ECA is to work as a hydraulic filter and dampen the pulsation emitted by the pump. The difficulty in the automotive industry is that the pump is often driven directly by the engine, which implies that the undesired frequency spectrum varies with the pump speed. Attenuator technology in industrial applications is often easier to design when the spectrum of frequency is fixed. In this research, the function of the ECA is not studied in detail; the focus has rather been on the drawbacks with the attenuator, which will reflect on the overall system layout