Patent ID: 7934581

Claim:
An apparatus comprising: a conduit portion having a first end, a second end, a conduit inner surface and a conduit outer surface; a plurality of chambers in series and in fluid communication with the conduit portion including: a first chamber defined, at least in part, by a first outer housing and a first chamber volume, wherein the first chamber is in fluid communication with the conduit portion through a plurality of first conduit apertures, and wherein the fluid is permitted to flow between the conduit portion and the first chamber through a first flow area; a second chamber defined, at least in part, by a second outer housing and a second chamber volume, wherein the second chamber is in fluid communication with the conduit portion through a plurality of second conduit apertures, and wherein the fluid is permitted to flow between the conduit portion and the second chamber through a second flow area; and a third chamber defined, at least in part, by a third outer housing and a third chamber volume such that the second chamber is disposed between the first chamber and the third chamber, wherein the third chamber is in fluid communication with the conduit portion through a plurality of third conduit apertures, and wherein the fluid is permitted to flow between the conduit portion and the third chamber through a third flow area, wherein the chambers are adjacently aligned in series and the pluralities of apertures formed in the conduit portion increase in the direction of the fluid flow between the first end and the second end, such that the plurality of third conduit apertures formed in the conduit portion is greater in number than the plurality of second conduit apertures formed in the conduit portion and the plurality of second conduit apertures is greater in number than the plurality of first conduit apertures formed in the conduit portion.