초록 ▼

A sound attenuating panel for installation in the high velocity air flow region of an engine nacelle and/or other applications requiring sound absorbing material. The panel utilizing a single layer of either a metallic or nonmetallic cellular honeycomb core with a solid or perforated septum disposed

A sound attenuating panel for installation in the high velocity air flow region of an engine nacelle and/or other applications requiring sound absorbing material. The panel utilizing a single layer of either a metallic or nonmetallic cellular honeycomb core with a solid or perforated septum disposed internally therein. The septum may have a planar or non-planar configuration within the individual cells of the core thereby providing means for reducing the noise level of various sound frequencies created by a jet engine or any other sound producing devices for that matter. The invention of the planar or non-planar septum provides structural stabilization and/or vibration dampening to a bonded sandwich assembly.

대표청구항 ▼

A sound attenuating panel for installation in the high velocity air flow region of an engine nacelle, and other applications requiring acoustic treatment, the panel comprising: a single layer of cellular honeycomb core; an acoustic planar septum formed internally in said core, said planar septum mad

A sound attenuating panel for installation in the high velocity air flow region of an engine nacelle, and other applications requiring acoustic treatment, the panel comprising: a single layer of cellular honeycomb core; an acoustic planar septum formed internally in said core, said planar septum made up of a plurality of individual continuous co-planar septum permanently attached to the sides of each individual cell of said core, said planar septum dividing the layer of said core along the length thereof and forming a planar geometric configuration therein; and at least one sheet of facing material attached to the surface of said core.