An air induction housing having a perforated wall which provides a first
intake noise attenuation modality and further having a sound attenuation
chamber interfaced with the perforated wall which provides a second
intake noise attenuation modality. Multiply apertured tubes of the sound
attenuation chamber provide a Helmholtz resonator, wherein the tubes are
superposed the wall perforations so that, attendant to the noise
attenuation, ample air entry into the air induction housing is provided.
The size, number and arrangement of the perforations is selected such
that ample airflow is provided and audibility of intake noise is
minimized in conjunction with the corresponding tubes of the sound
attenuation chamber.