An air introduction system (10) includes an active noise control system (22, having an environmentally protected microphone (24). A microphone support structure (26) defines a louvered cage (38) over a microphone reception cavity (40). The microphone (24) ...

The air induction system (8) comprises an air induction body (10) and speaker (14) disposed about the air induction body. A control unit (26) communicates with the speaker and has at least two modes of noise attenuation signal generation. An engine speed s...

An active noise attenuation system for an air induction assembly is operably connected to an engine that generates a low frequency noise having a noise profile defining a peak noise. The system has an air inlet duct housing (12) with an inlet (16) and an o...

The air induction system comprises an air intake and speaker disposed about the air intake. A control unit is in communication with the speaker. At least one receiver permits communication between the control unit and at least one powertrain input. An engi...

The air induction system (22) comprises an air induction body (18) having a mouth (14) emanating a first sound and a speaker (10) emanating a second sound disposed about the mouth (14). The mouth has at least a first mouth portion (68) and at least a secon...

Measured sound behavior is influenced by at least partial closure (5) of the airflow duct (3) at given, periodic intervals, during which little or no air mass transfer takes place. An Independent claim is included for equipment carrying out the method.