Abstract: The present invention provides a hose assembly for attenuating noise from fluid pressure pulses in a power steering assembly. The assembly includes a hose disposed between a fluid pump and power steering gear and a tuning conduit disposed within the hose that defines concentric outer and inner fluid passages within the hose. The conduit includes an annular wall and one or more integral cross walls extending between points on the annular wall to subdivide the inner fluid passage into a plurality of parallel, longitudinally extending fluid passages allowing tuning over a broader frequency range.

Abstract: Apparatus for reducing fluid-borne noise in a hydraulic system that includes a housing that defines a hollow chamber, and inlet and outlet connections for in-line connecting the apparatus in a hydraulic fluid flow system. A resilient member is disposed within the housing and effectively divides the housing chamber into a first portion adjacent to the fluid inlet and outlet for receiving hydraulic fluid, and a second portion remote from the fluid inlet and outlet for containing gas under pressure. Pressure pulsations in the hydraulic fluid are reduced and at least partially absorbed by the combined effect of resiliency of the elastic member and compressibility of the contained gas.