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NOISE REDUCTION FOR AN INTERNAL COMBUSTION ENGINE

  • US 20080078610A1
  • Filed: 05/01/2007
  • Published: 04/03/2008
  • Est. Priority Date: 10/03/2006
  • Status: Active Grant
First Claim
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1. A system for reducing noise associated with an internal combustion engine, the system comprising:

  • an internal combustion engine for operating at an operational speed of an engine shaft;

    an exhaust system associated with a resonant cavity at one or more desired acoustic wavelengths of attenuation;

    a microphone placed in proximity to the exhaust system for detecting a noise level associated with the exhaust system; and

    a controller for controlling the operational speed of the engine based on the detected noise level and a desired noise level.

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