An air induction housing having a perforated wall which simultaneously
provides ample air entry into the air induction housing and excellent
intake noise attenuation. The size, number and arrangement of the
perforations is selected such that ample airflow is provided and
audibility of intake noise is minimized, based upon simultaneous
optimization of: providing a plurality of perforations which collectively
have an opening size that accommodates all anticipated airflow
requirements; sizing each of the perforations such that the airflow
demand involves an airflow speed through each perforation that is below a
predetermined threshold at which perforation airflow noise is generated;
and arranging the perforation distribution in cooperation with
configuring of the air induction housing to provide a highest level of
intake noise attenuation.