242results about How to "Improve acoustic properties" patented technology

An improved acoustically and thermally insulating fire-retardant composite material suitable for use in structures such as buildings, appliances, and the interior passenger compartments and exterior components of automotive vehicles is provided. The material is comprised of at least one airlaid fibrous layer of controlled density and composition and incorporating suitable binding agents and additives as needed to meet expectations for noise abatement, fire-retardancy, and mildew resistance. Separately, an airlaid structure which provides a reduced, controlled airflow therethrough useful for acoustic insulation is provided, and which includes a woven or nonwoven scrim. A process for the production of the fire retardant nonwoven material is also provided.

An improved acoustically and thermally insulating composite material suitable for use in structures such as buildings, appliances, and the interior passenger compartments and exterior components of automotive vehicles, comprising at least one airlaid fibrous layer of controlled density and composition and incorporating suitable binding agents and additives as needed to meet expectations for noise abatement, fire, and mildew resistance. Separately, an airlaid structure which provides a reduced, controlled airflow therethrough useful for acoustic insulation is provided, and which includes a woven or nonwoven scrim.

A method of mounting a flat panel speaker is provided which is capable of reliably preventing entry of dust and of shortening assembling time. By bonding a gasket member to a diaphragm, by pasting a separator to a gasket member side opposite to the diaphragm and, by sandwiching the diaphragm and the gasket member from both sides, a gasket-attached diaphragm is fabricated. After peeling off a protecting sheet on a rear side of the gasket-attached diaphragm, the actuator module is bonded to the diaphragm. Then, after peeling the separator from the gasket-attached diaphragm, positioning is performed on the diaphragm and the gasket member is bonded to a putting-face of the front case. The entry of dust into a region corresponding to a liquid crystal display panel is blocked by a partitioning portion of the gasket member.

Apparatus and method for manufacturing an electroacoustic transducer for, for instance, a hearing aid, with a diaphragm arranged in a housing. The diaphragm is attached onto a film or punched from a sheet of material, such that along the circumferential edge of the diaphragm, a free strip of film or a strip of material remains present, in a capillary space between the circumferential edge of the film and the inner wall of the housing, or in a capillary space between the diaphragm and the strip of material, a polymer of a low viscosity is provided to connect to diaphragm with the housing wall. Through the method, the production of the transducer is greatly simplified.

A permanent magnet synchronous machine with improved torque and power characteristics. A circumferential-oriented rotor assembly is provided with alternating permanent magnets and magnetic pole pieces. In order to reduce the amount of leakage flux in the rotor and increase the effective length of the permanent magnet, a trapezoidal or otherwise tapered permanent magnet structure is used. By alternating trapezoidal permanent magnet, and magnetic pole pieces, a higher intensity magnetic field is created in the air gap utilizing the same radial space in the motor without altering the weight or volume of the motor compared to conventional machines.

An electroacoustic transducer comprises: a lower electrode; an upper electrode including an oscillation portion and a support portion for supporting the oscillation portion at least at a part of a periphery of the oscillation portion; and an insulating layer for insulating the lower electrode from the upper electrode, wherein the upper electrode has an up and down in the oscillation portion and / or in the support portion to provide a cavity between the upper electrode and the lower electrode.

This composite building stud combines two metal shapes, inner and outer, with an insulating material to form a composite structural member having excellent acoustical properties. The stud also has an insulating valve (R-value) greater than a similar metal member normally used as a stud in a residential structure. The composite also has a strength comparable to that of a similar steel member normally used as a stud in a residential structure. One shape encompasses the other shape. The composite structural member eliminates any direct metal connections and thus eliminates any thermal shorts that reduce the overall insulating value (R-value) of the composite member.

The present invention relates to acoustic properties of a terminal device of a telecommunication network. To improve the capability of the terminal device to maintain the sound quality good while the distance between the speaker and the ear changes, the enclosure of the terminal device is provided with means (71, 81) for conveying the acoustic waves generated backwards by the speaker (30) of the device inside the enclosure to a cavity-like antenna space (80) intended for the antenna of the terminal device.

Improved glass fibers compositions, typically useful for fire resistant blankets or containers to provide high burn-through resistance at high temperatures of 2,400° F. and higher, and typically comprising silica, sodium oxide, potassium oxide, calcium oxide, magnesium oxide, ferrous+ferric oxide, and titanium oxide; the improved glass compositions may further include alumina, lithium oxide, and boron oxide.

A glazing panel comprises top and bottom layers either side of an open cell core such as a honeycomb structure. The panel may include additional layers for imparting performance enhancing properties, such as a solar control layer and an insulation layer.

The guide device for the diffusor at the compressor impeller outlet of a radial compressor has guide blades with stepped inlet edges. The step is implemented by setting back the hub-side inlet edge. This meridional stepping divides the guide blades into two component blades, of which the first component blade is made longer than the second component blade. The set-back of the inlet edge of the hub-side component blade and the associated superposition of the noise fields which are produced on the front and rear inlet edge of the diffusor leads to improvement of the acoustic properties of the compressor.

An automotive tufted carpet with improved acoustic properties is formed with a two-part primary backing. The first backing layer is formed of a woven or non-woven material, and the second backing layer is formed of a microfilament spunlaced material possessing sound absorbing acoustic properties. The first backing layer and second backing layer are thermobonded together with an adhesive web positioned therebetween to form the two-part primary backing. Tufts of yarn are then sewn through the two-part primary backing. The resulting acoustically enhanced automotive tufted carpet may be backcoated or precoated, and may have a secondary backing adhered thereto as a matter of choice.

Laminated glass is produced by laminating at least one film A, having a glass transition temperature TA and containing a polyvinyl acetal PA and optionally at least one plasticiser WA, and at least one film B, having a glass transition temperature TB and containing a polyvinyl acetal PB and at least one plasticiser WB, between two glass sheets, wherein, before the lamination process,film A has a proportion of plasticiser WA of less than 24% by weight,film B has a proportion of plasticiser WB of at least 24% by weight, andfilm A has a thickness of no more than 30% of the thickness of film B.

A floor board assembly convenient to lay is characterized in that, in one embodiment, it comprises a frame, a filler board and an upper material with the frame and filler board affixed to the underside of the upper material. The frame includes latch tongues that extend outwardly from the lower side edges of the frame, and the tongues have locking projections that fit into recesses arranged just inside the periphery of the underside of the frame. The tongues and intervening spaces (with locking bars behind them) are space along the periphery of the board, such that any side of one board may be joined to any side of a similarly configured board. The upper material may be selected from a variety of materials, including LVT (luxury vinyl tile), carpet, high pressure laminate or other decorative material. The filler board may be selected to accomplish reduced cost, and / or improved acoustics. In other embodiments, a frame and / or upper material may be absent. The floor board assembly requires a lower manufacture cost and lower equipment investment, has stable quality, versatility and ease of installation.

A hearing aid (1) comprises a receiver (19), an output port (6), a conduit (13) for conveying sound to the port and a barrier element (39) adapted for baffling entry of ear wax and moisture and for being acoustically transparent. The invention further provides a barrier element (39) for a hearing aid comprising a slab having an exterior surface and through openings for transverse transmission of sound, wherein the exterior surface is super-hydrophobic.

A cover layer (1) for a panel (3) which has a panel base body (2), such as a floor covering panel, wall panel or ceiling sheathing panel and / or furniture component panel, building panel, covering panel or dry finish panel and / or as a facade element, panel element or board element, trimming plate or the like, the cover layer (1) having a paper layer (4) and a film layer (6) of elastic plastic which forms the outside (5) of the cover layer (1). The paper layer (4) is made as a preimpregnate which has already been partially impregnated during paper manufacture or as paper, especially decorative paper, which has been partially impregnated after paper manufacture and before joining to the paper layer (4).

An acoustic logging tool sleeve with a preferably discontinuous, alternating structure that is acoustically opaque in some zones, and acoustically transparent in others. The sleeve may be modular, with several stages connected together. The multiple stages provide a sleeve that may be useful with a variety of borehole logging tools to reduce or eliminate the transmission of noise to the receiving elements.

A floor board assembly convenient to lay is characterized in that, in one embodiment, it comprises a frame, a filler board and an upper material with the frame and filler board affixed to the underside of the upper material. The frame includes latch tongues that extend outwardly from the lower side edges of the frame, and the tongues have locking projections that fit into recesses arranged just inside the periphery of the underside of the frame. The tongues and intervening spaces (with locking bars behind them) are space along the periphery of the board, such that any side of one board may be joined to any side of a similarly configured board. The upper material may be selected from a variety of materials, including LVT (luxury vinyl tile), carpet, high pressure laminate or other decorative material. The filler board may be selected to accomplish reduced cost, and / or improved acoustics. In other embodiments, a frame and / or upper material may be absent. The floor board assembly requires a lower manufacture cost and lower equipment investment, has stable quality, versatility and ease of installation.

The invention relates to a magnesium alloy integrally cast sound box which comprises a sound box body (1), wherein, a high-frequency loudspeaker (10), a medium / low-frequency loudspeaker (11) and an electronic frequency divider (7) are installed in the sound box body (1), the sound box body (1) is connected with a wiring post (8) through a wire, and a sound absorption layer (9) is arranged on the inner wall of the sound box body (1). The sound box body (1) is a magnesium alloy integrally cast structure, and a high-frequency loudspeaker hole (3) is arranged at the upper part of the sound box body (1); a medium / low-frequency loudspeaker hole is arranged at the middle part of the sound box body (1); and a sound-wave reversed phase hole (5) is arranged at the lower part of the sound box body (1). The manufacturing method comprises the following steps: the magnesium alloy is melted in a smelting furnace in the air or under the protective atmosphere, and the casting core can adopt a wooden core, metal core, and the like, by various molding and casting processes such as sand casting, metal mold casting, and the like; the magnesium alloy adopted in the method comprises the following component of Mg-X alloy, wherein, X can be an element such as Ni, Zr, Al, Cu, and the like, and one or more of the elements can be adopted to be combined with Mg to form binary, ternary or polynary magnesium alloy; and the sound box is characterized in that the seamless sound box body can be conveniently in any shape and complex structure. The invention has the advantages of simple structural process, low manufacturing cost and good tone color.

An acoustic logging tool sleeve with a preferably discontinuous, alternating structure that is acoustically opaque in some zones, and acoustically transparent in others. The sleeve may be modular, with several stages connected together. The multiple stages provide a sleeve that may be useful with a variety of borehole logging tools to reduce or eliminate the transmission of noise to the receiving elements.

An electroacoustic transducer employing a polymer connection for maximizing volume displacement. The transducer includes a diaphragm in a case and means for converting. The diaphragm includes a central portion. The means for converting converts between an electric signal and a vibration of the central portion of the diaphragm or vice versa while the diaphragm is coupled to the case. The central diaphragm has an outer edge, and between the outer edge and the inner wall of the transducer case a capillary space is present in which a polymer is provided as a coupling between the outer edge and the inner wall of the case.

A composite laminate has a pattern of holes therein. The holes are formed by laying down plies of unidirectional pre-preg material having varying fiber orientations. The tows are spaced apart and located to form holes through the laminate.