Consecutive plate acoustic suppressor apparatus and methods

Details Consecutive plate acoustic suppressor apparatus and methods Consecutive plate acoustic suppressor apparatus and methods

1992-10-16

1993-10-05

Gellner, Michael L.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181286, 181294, 181296, E04F 1704

Patent

active

052507645

ABSTRACT:
An apparatus and method for suppressing acoustic noise utilizes consecutive plates, closely spaced to each other so as to exploit dissipation associated with sound propagation in narrow channels to optimize the acoustic resistance at a liner surface. The closely spaced plates can be utilized as high temperature structural materials for jet engines by constructing the plates from composite materials. Geometries of the plates, such as plate depth, shape, thickness, inter-plate spacing, arrangement, etc., can be selected to achieve bulk material-like behavior.

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"The Design of Sound Absorptive Materials to Meet Special Requirements", by L. S. Wirt, Presented at the 86th Meeting Accoustical Society of America, Los Angeles, California, Oct. 31, 1973.

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