High efficiency broadband acoustic resonator and absorption pane

Details High efficiency broadband acoustic resonator and absorption pane High efficiency broadband acoustic resonator and absorption pane

1981-09-29

1983-12-20

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181286, 181292, 428116, B64D 3300

Patent

active

044212011

ABSTRACT:
A high efficiency broadband acoustic resonator and absorption panel used for reducing engine noise from high bypass fan jet engines mounted on an aircraft. The panel uses a single layer of cellular honeycomb core with a pair of parallel acoustic septums formed internally in the core for attenuating high and medium frequency sounds during all engine operations as well as the low frequency combination tone and "buzzsaw" noise experienced during high power aircraft takeoff and cutback engine power settings.

REFERENCES:
patent: 4257998 (1981-03-01), Diepenbrock, Jr. et al.
patent: 4265955 (1981-05-01), Harp et al.

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