Use of an engine rotation reference signal for noise attenuation

摘要

The air induction system comprises an air induction body (10) and speaker (14) supported about the air induction body. A control unit (18) communicates with the speaker, controlling its output. The control unit also receives a reference signal (46) from an alternator (24) of a vehicle engine (22) and uses this signal to generate a noise attenuating signal based on the reference signal. <IMAGE>