# US 8,340,341 B2 · Coated speaker dome > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,340,341 B2 - Document ID: US8340341B2 - Status: Granted - Kind: B2 - Application number: 11/813,959 - Filed: 2006-01-12 - Published: 2008-06-05 - Granted: 2012-12-25 - Earliest claimed: 2005-01-14 - Assignees: Element Six Limited - Inventors: Neil Perkins; Charles Simon James Pickles; Christopher John Howard Wort; Geoffrey Alan Scarsbrook - Web page: https://patentgrep.com/patent/US8340341B2 ## CPC - H04R 7/127: {dome-shaped} - Y10T 428/12431: Foil or filament smaller than 6 mils - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A rigid three-dimensional component such as a speaker dome is formed of diamond, preferably fabricated to net shape by CVD diamond synthesis, and includes a coating on one or more major surfaces thereof. The coating is designed to enhance the performance and/or to alter the appearance of the component. In particular, the coating is designed to act as a damping medium and/or provide aesthetic qualities to the component. ## Claims ### Claim 1 A speaker dome, comprising: a dome body formed of a material of high stiffness or high rigidity and having respective inner and outer surfaces; and a coating on either one or both of the surfaces of the dome body, wherein the coating is formed of material selected from a group consisting of metals, polymers, plastics, and other solid organic coating materials, wherein the dome body is formed of diamond, and wherein the diamond dome body is fabricated to a net shape by CVD diamond synthesis. ### Claim 2 (depends on 1) A speaker dome according to claim 1, wherein the coating comprises a metal selected from Ti, Au, Pt, and Al. ### Claim 3 (depends on 1) A speaker dome according to claim 1, wherein the coating comprises a metal selected from Ti, Au, and Al. ### Claim 4 (depends on 1) A speaker dome according to claim 1, wherein the coating comprises a polymer based paint, a resist material or a photo-resist material. ### Claim 5 (depends on 1) A speaker dome according to claim 1, wherein the dome body has a thickness of from 5 μm to 500 μm. ### Claim 6 (depends on 1) A speaker dome according to claim 1, wherein the dome body has a thickness of from 20 μm to 100 μm. ### Claim 7 (depends on 1) A speaker dome according to claim 1, wherein the dome body has a thickness of from 40 μm to 50 μm. ### Claim 8 (depends on 1) A speaker dome according to claim 1, wherein the dome body is convex from the side of the listener. ### Claim 9 (depends on 1) A speaker dome according to claim 1, further comprising: an integral coil mounting flange or tube. ### Claim 10 (depends on 1) A speaker dome according to claim 1, wherein the coating includes a plurality of separate layers of different materials. ### Claim 11 (depends on 1) A speaker dome according to claim 1, wherein the coating is arranged to modify the damping or resonant behaviour of the speaker dome. ### Claim 12 (depends on 11) A speaker dome according to claim 11, wherein the coating damps out deleterious vibrations, or reduces their amplitude or impact on audible performance of the speaker dome. ### Claim 13 (depends on 11) A speaker dome according to claim 11, wherein a break-up frequency thereof is greater than 45 kHz and a deviation in an on-axis response curve from a flat response, measured at 4/9 of the break-up frequency, is less than 3 dB. ### Claim 14 (depends on 11, 12, 13) A speaker dome according to any one of claims 11 to 13, wherein the coating is placed on the inner surface of the dome body. ### Claim 15 (depends on 11) A speaker dome according to claim 11, wherein the coating increases a sheet density of the dome body by less than 20%. ### Claim 16 (depends on 15) A speaker dome according to claim 15, wherein the coating increases the sheet density of the dome body by less than 5%. ### Claim 17 (depends on 16) A speaker dome according to claim 16, wherein the coating increases the sheet density of the dome body by less than 1%. ### Claim 18 (depends on 11) A speaker dome according to claim 11, wherein the coating is partially densified or porous. ### Claim 19 (depends on 18) A speaker dome according to claim 18, wherein the coating is foamed. ### Claim 20 (depends on 11) A speaker dome according to claim 11, wherein the coating is formed of an organic material. ### Claim 21 (depends on 1) A speaker dome according to claim 1, wherein the coating is arranged to modify or enhance aesthetic properties or an appearance of the speaker dome. ### Claim 22 (depends on 21) A speaker dome according to claim 21, wherein the coating is placed on the outer surface of the dome body. ### Claim 23 (depends on 21, 22) A speaker dome according to claim 21 or claim 22, wherein the coating increases a sheet density of the dome body by less than 3%. ### Claim 24 (depends on 23) A speaker dome according to claim 23, wherein the coating increases the sheet density of the dome body by less than 0.5%. ### Claim 25 (depends on 24) A speaker dome according to claim 24, wherein the coating increases the sheet density of the dome body by less than 0.1%. ### Claim 26 (depends on 21) A speaker dome according to claim 21, wherein the coating is formed of a metal or metal alloy. ### Claim 27 (depends on 1) A speaker dome according to claim 1, wherein the coating is patterned to provide a trademark or other character or symbol. ### Claim 28 (depends on 27) A speaker dome according to claim 27, wherein the patterning includes open or transparent apertures in the coating suitable for back lighting. ### Claim 29 (depends on 1) A speaker dome according to claim 1, wherein the speaker dome is a high performance tweeter dome. ### Claim 30 (depends on 29) A speaker dome according to claim 29, wherein the speaker dome is a high power tweeter dome suitable for high acoustic power projection. ### Claim 31 (depends on 29, 30) A speaker dome according to claim 29 or claim 30, wherein a diameter of the dome body of the tweeter is greater than 24 mm. ### Claim 32 (depends on 31) A speaker dome according to claim 31, wherein the diameter of the dome body of the tweeter dome is greater than 35 mm.