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High frequency silencer for an air induction system

  • US 9,970,351 B2
  • Filed: 11/18/2014
  • Issued: 05/15/2018
  • Est. Priority Date: 11/19/2013
  • Status: Active Grant
First Claim
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1. A filter assembly, comprising:

  • a filter media sized for positioning within an air induction system, the filter media possessing a first side and a second side substantially opposite the first side; and

    a layer of sound absorbing foam positioned adjacent one of the first side of the filter media and the second side of the filter media, the sound absorbing foam including a plurality of perforations therein, the plurality of perforations permitting air to flow through the filter media and the layer of sound absorbing foam, the plurality of perforations covering approximately 35 to 50 percent of a face of the layer of sound absorbing foam.

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