Patent ID: 7694660

Claim:
An air induction housing providing sound attenuation of engine intake noise, comprising: a housing having a predetermined configuration; a perforated wall, wherein a plurality of perforations are formed in said perforated wall, said plurality of perforations collectively providing a predetermined intake opening size for said housing, said housing further comprising an engine air intake connection; and a sound attenuation chamber connected with said perforated wall and said housing, wherein said sound attenuation chamber comprises a plurality of selectively apertured tubes passing through an internal space of said sound attenuation chamber, wherein each tube is disposed superposed a respective perforation of said perforated wall, wherein each tube is free of layering externally therearound, and wherein the internal space is free of absorbent filling material such that the internal space is filled only with air; wherein said plurality of perforations have a distribution selected in relation to said configuration such that the engine intake noise is first attenuated at said plurality of perforations; and wherein the engine intake noise is secondly attenuated at said sound attenuation chamber.