Ductless acoustical noise attenuator

Claim 1

A ductless noise attenuator comprising: a housing which is mounted between an air conditioning unit and a recipient, said housing conducting an air flow from said air conditioning unit to said recipient and having an inlet with inlet edges which protrude into the housing's interior, said housing also having an outlet with outlet edges which protrude into the housing's interior; and a diamond-shaped core mounted in said housing which blocks line-of-sight soundwaves from the air conditioning unit while allowing the air flow to pass to the recipient, said diamond-shaped core including first and second leading edge sides, first and second trailing edges, and a deflector, said first and second leading edge sides fitting together to form a point which faces the inlet of the housing, said first and second leading edges having an aperture in the point to allow the airflow to enter the diamond-shaped core; said first and second trailing edges being respectively connected to the first and second leading edges at positions between the inlet and outlet edges on the sides of the housing, said first and second leading and trailing edges thereby blocking line-of-sight soundwaves from the air conditioning unit; and said deflector being fixed between said first and second leading and trailing edges at a position aligned with the aperture in the point to block line-of-sight soundwaves from the air conditioning unit.