240results about How to "Improve acoustic properties" patented technology

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.

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.

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.

Thermal compression moldable nonwoven multilayered fibrous batts having substantially uniform density are provided, which are useful, for example, for fabrication of multi-density molded parts, such as multi-density molded vehicle liners. The nonwoven multilayered fibrous batts of uniform density comprising needle-punched first and second (and optionally third and / or fourth) fibrous batt layers formed with different fiber blends, wherein the multilayered batt can be molded into acoustical parts having multi-densities.

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.

In one embodiment, the sight and sound barriers of this invention have a flexible sheet of lightweight, resilient foam as a core. This core is covered by a fabric or other suitable covering to further enhance the acoustic properties and to make the walls attractive. In this embodiment the core of polyethylene, polystyrene, urethane, or a mosaic thereof, for example, is made flexible with alternating wall and hinge portions. In an alternate preferred embodiment, the barriers or panels are formed with mitered grooves to allow the panel to be bent into larger degree corners, such as 90 degrees in one direction or 180 degrees in the opposite direction.

The present invention provides a method of providing parameters for the fitting process of individually shaped or customized hearing devices by collecting and storing fitting parameters during a fitting process by a local fitting computer; generating an individual encryption key related to the hearing device; sending the stored fitting parameters encrypted with the encryption key to a remote database; storing the encryption key in the memory of the hearing device; reading out the encryption key from the hearing device; reading out data from the remote database using the encryption. Thus, the privacy of the individual fitting data of a hearing device is secured.

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.

An acoustic apparatus comprising a yoke, a main speaker mechanism disposed on a first surface of the yoke, and a sub speaker mechanism disposed on a second surface of the yoke opposite to the first surface and adjacent to the main speaker mechanism, the main speaker mechanism including a first magnet disposed on the first surface of the yoke, a first top plate disposed on the first magnet, a vibration-transmitting panel attached to the yoke and contactable with a vibrating member in a communication device, and a first voice coil attached to the vibration-transmitting panel and inserted in a first magnetic gap formed between the yoke and the first magnet, the sub speaker mechanism including a second magnet disposed on the second surface of the yoke, a second top plate disposed on the second magnet, a vibrating plate attached to a frame disposed to surround the yoke and a second voice coil attached to the vibrating plate and inserted in a second magnetic gap formed between the yoke and the second magnet.

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 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.

A micromechanical structure and a method for producing a micromechanical structure are provided, the micromechanical structure being configured for receiving and / or generating acoustic signals in a medium at least partially surrounding the structure. The structure includes a first counterelement that has first openings and essentially forms a first side of the structure, a second counterelement that has second openings and essentially forms a second side of the structure, and an essentially closed diaphragm disposed between the first counterelement and the second counterelement.

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.

A panel includes about 0.1% to about 95% by weight of a ground renewable component. In an embodiment, the panel has at least one core comprising: from about 0.1% to about 95% by weight of the ground renewable component; from about 0.1% to about 95% by weight of one or more fibers; and from about 1% to about 30% by weight of one or more binders, all based on dry panel weight. In an embodiment, the ground renewable component has a particle size distribution whereby less than 5% of the particles are retained by a mesh screen with openings of about 0.312 inches and less than 5% of the particles pass through a mesh screen with openings of about 0.059 inches. A method for manufacturing such panels is also provided.