Pressure pulsation is caused by the flow ripples from a positive displacement hydraulic pump. It transmits throughout fluid power equipment and causes unwanted excitation of the mechanical parts. In many practical applications. a Helmholtz type hydraulic silencer may be used to attenuate such pulsation. https://mypopes.shop/product-category/aaa-exclusive-demon-slayer-funko-pop-canada-tanjuro-kamado/