# US 12,118,971 B2 · Aircraft acoustic panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,118,971 B2 - Document ID: US12118971B2 - Status: Granted - Kind: B2 - Application number: 17/720,174 - Filed: 2022-04-13 - Published: 2022-11-17 - Granted: 2024-10-15 - Earliest claimed: 2021-05-12 - Assignees: B/E Aerospace, Inc. - Applicants: B/E Aerospace, Inc. - Inventors: Julian Winkler; Kenji Homma; Craig A. Reimann; Jeffrey M. Mendoza; Paul R. Braunwart - Web page: https://patentgrep.com/patent/US12118971B2 ## CPC - B64C 1/40: Sound or heat insulation {, e.g. using insulation blankets} - G10K 11/162: Selection of materials - B64D 11/00: Passenger or crew accommodation; Flight-deck installations not otherwise provided for - G10K 11/172: using resonance effects - B64C: AEROPLANES; HELICOPTERS - G10K: SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT ## Abstract An acoustic supercell may comprise a facesheet having a plurality of perforations, a backplate parallel to the facesheet, a cell wall contacting the facesheet and the back plate, and a periodic structure. The supercell may be custom-tailored to meet specific acoustic wavelength absorption targets. The custom-tailored supercell may be arranged with a plurality of other custom-tailored supercells into an acoustic panel. ## Claims ### Claim 1 An acoustic panel comprising: a first set of supercells, each of the first set of supercells configured for acoustic absorption; a supercell surrounded by the first set of supercells in a first position within the acoustic panel, the supercell including: a facesheet having a plurality of perforations; a back plate parallel to the facesheet; a cell wall contacting the facesheet and the back plate, wherein the cell wall is substantially orthogonal to the facesheet and the back plate; and a periodic structure having a first unit cell, the first unit cell having a first central body and a first axial tube disposed on the first central body and a second axial tube disposed on the first central body, opposite the first axial tube, each of the first axial tube and the second axial tube being in fluid communication with one another through the first central body, wherein the facesheet, the back plate, and the cell wall are in fluid communication with the periodic structure, wherein the facesheet, the back plate, and the cell wall are configured to enclose the periodic structure. ### Claim 2 (depends on 1) The acoustic panel of claim 1, wherein the first unit cell includes a first lateral tube, disposed on and in fluid communication with the first central body, and a second lateral tube, opposite the first lateral tube and disposed on and in fluid communication with the first central body. ### Claim 3 (depends on 2) The acoustic panel of claim 2, wherein the first unit cell includes a third lateral tube, disposed on and in fluid communication with the first central body, and a fourth lateral tube, opposite the third lateral tube and disposed on and in fluid communication with the first central body. ### Claim 4 (depends on 3) The acoustic panel of claim 3, wherein each of the first axial tube, the second axial tube, the first lateral tube, the second lateral tube, the third lateral tube and the fourth lateral tube are in fluid communication with each other via the first central body. ### Claim 5 (depends on 4) The acoustic panel of claim 4, wherein at least one of the first axial tube, the second axial tube, the first lateral tube, the second lateral tube, the third lateral tube or the fourth lateral tube is completely sealed. ### Claim 6 (depends on 4) The acoustic panel of claim 4, wherein at least one of the first axial tube, the second axial tube, the first lateral tube, the second lateral tube, the third lateral tube or the fourth lateral tube is completely sealed via the cell wall, wherein the cell wall is configured to block a flow of fluid therethrough. ### Claim 7 (depends on 4) The acoustic panel of claim 4, wherein at least one of the first axial tube, the second axial tube, the first lateral tube, the second lateral tube, the third lateral tube or the fourth lateral tube is partially sealed. ### Claim 8 (depends on 4) The acoustic panel of claim 4, wherein at least one of the first axial tube, the second axial tube, the first lateral tube, the second lateral tube, the third lateral tube or the fourth lateral tube is partially sealed via a mesh configured to partially restrict a flow of fluid therethrough. ### Claim 9 (depends on 2) The acoustic panel of claim 2, further comprising a second unit cell interconnected to the first unit cell, the second unit cell having a second central body and a pair of axial tubes disposed and a pair of lateral tubes disposed on and in fluid communication with the second central body. ### Claim 10 (depends on 9) The acoustic panel of claim 9, wherein the first lateral tube of the first unit cell is interconnected to one of the pair of lateral tubes of the second unit cell. ### Claim 11 (depends on 10) The acoustic panel of claim 10, further comprising a third unit cell interconnected to the first unit cell and a fourth unit cell interconnected to the second unit cell and to the third unit cell, wherein each of the first unit cell, the second unit cell, the third unit cell and the fourth unit cell are comprised within a layer of unit cells, wherein a hole is formed extending between the first unit cell, the second unit cell, the third unit cell and the fourth unit cell, wherein the layer of unit cells is one of a plurality of layers of unit cells. ### Claim 12 An acoustic panel, comprising: a plurality of supercells forming an acoustic attenuating structure, the plurality of supercells including a first supercell and a second supercell, wherein: the first supercell tuned to a first frequency; the second supercell tuned to a second frequency that is different from the first frequency, and each of the plurality of supercells comprises: a facesheet having a plurality of perforations; a back plate parallel to the facesheet; a cell wall contacting the facesheet and the back plate, wherein the cell wall is substantially orthogonal to the facesheet and the back plate; and a first periodic structure having a first unit cell, a second unit cell, a third unit cell and a fourth unit cell, wherein each of the first unit cell, the second unit cell, the third unit cell and the fourth unit cell includes a central body interconnected via a plurality of lateral tubes extending from the central body, the first periodic structure forming a first lateral layer of unit cells, wherein the facesheet, the back plate, and the cell wall is in fluid communication with the first periodic structure. ### Claim 13 (depends on 12) The acoustic panel of claim 12, further comprising a second periodic structure, the second periodic structure forming a second lateral layer of unit cells interconnected to the first lateral layer of unit cells, wherein the second lateral layer of unit cells is interconnected to the first lateral layer of unit cells via a plurality of axial tubes. ### Claim 14 (depends on 13) The acoustic panel of claim 13, wherein the first lateral layer of unit cells and the second lateral layer of unit cells each comprise a plurality of holes extending axially between adjacent pairs of unit cells that comprise the first lateral layer of unit cells and the second lateral layer of unit cells and wherein the plurality of holes defines a space exterior to the first lateral layer of unit cells, the space being either partially restricted or completely restricted by a hole mesh. ### Claim 15 An acoustic panel, comprising: a plurality of supercells, each of the plurality of supercells comprising: a first periodic structure having a first unit cell, a second unit cell, a third unit cell and a fourth unit cell, wherein each of the first unit cell, the second unit cell, the third unit cell and the fourth unit cell includes a central body interconnected via a plurality of lateral tubes extending from the central body, the first periodic structure forming a first lateral layer of unit cells; an outer facesheet parallel to the first periodic structure; a back plate parallel to the outer facesheet; and a cell wall contacting the outer facesheet and the back plate, wherein the cell wall is substantially orthogonal to the outer facesheet and the back plate, the cell wall further comprising an outer facesheet wall portion, wherein the outer facesheet, the first periodic structure, and the outer facesheet wall portion define an airgap, wherein: the outer facesheet, the back plate, and the cell wall are configured to enclose the first periodic structure, and the cell wall of a first of the plurality of supercells is disposed adjacent to, and is separate from, the cell wall of a second of the plurality of supercells. ### Claim 16 (depends on 15) An acoustic panel of claim 15, further comprising an inner facesheet having a plurality of perforations, wherein the inner facesheet is disposed between the first periodic structure and the outer facesheet, wherein the inner facesheet is parallel to the outer facesheet, wherein the outer facesheet, the inner facesheet, and the outer facesheet wall portion define the airgap, wherein the inner facesheet, the back plate, and the cell wall are in fluid communication with the first periodic structure, wherein the inner facesheet, the back plate, and the cell wall are configured to enclose the first periodic structure. ### Claim 17 (depends on 15) An acoustic panel of claim 15, wherein the outer facesheet is a non-permeable membrane. ### Claim 18 (depends on 15) An acoustic panel of claim 15, wherein the outer facesheet is a microporous membrane. ### Claim 19 (depends on 15) An acoustic panel of claim 15, wherein the cell wall defines a plurality of apertures. ### Claim 20 (depends on 12) The acoustic panel of claim 12, wherein: the first supercell is placed in a first position within the plurality of supercells, and the second supercell is placed in a second position within the plurality of supercells.