Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
June 16, 2009
Patent Application Number
11830655
Date Filed
July 30, 2007
Patent Primary Examiner
Patent abstract
An apparatus comprises a housing comprising an air inlet, an air outlet and a divider that divides the housing into first and second air passages. The housing comprises a resonance chamber for each air passage. Each resonance chamber comprises a port, and air waves enter each such resonance chamber through such port and resonate.
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