US 4,265,955 A · Honeycomb core with internal septum and method of making same

Abstract

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.

Claims9

Dependent claims

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.

1 more element

Dependencies are inferred from the claim text.

Honeycomb core with internal septum and method of making same

Life of this patent

Honeycomb core with internal septum and method of making same

Life of this patent

Abstract

Claims9