A manufacturing process for manufacturing wood products with acoustic dampening properties. A noise-dampening polymer is introduced in-line in the manufacturing process to achieve higher acoustic performance. The polymer can be a viscoelastic polymer which is added during blending of the lignocellulosic strands prior to mat formation, or sprayed or otherwise coated on the lignocellulosic strands during mat formation, prior to formation of any boards or panels.

The present disclosure relates to plaster boards and methods for making them. For example, one aspect of the disclosure is a plaster board comprising one or more continuous layers of material disposed within a body of hardened plaster material, the first side and second side of each continuous layer of material being substantially covered by the hardened plaster material. In certain such embodiments, each continuous layer of material includes a polymer (e.g., a damping polymer) disposed on a carrier sheet. Another aspect of the disclosure relates to a method for making a plaster board that involves drying a wet body of plaster material while a continuous layer of material or precursor therefor is disposed within it.

Provided is a nonwoven fabric and a laminated nonwoven fabric suitable as the skin material of a composite sound-absorbing material. The nonwoven fabric and laminated nonwoven fabric are easily formable, thin, and lightweight and excel in form stability, and can nevertheless be controlled within a given range of aeration after being formed into shape. A nonwoven fabric having a laminate structure in which at least one ultra-fine fiber layer (M) having an average fiber diameter of 0.3 to 7 μm (inclusive) and a basis weight of 1 g/m.sup.2 to 40 g/m.sup.2 (inclusive) and at least one continuous filament layer (S) having an average fiber diameter of 10 to 30 μm (inclusive) are integrated together by partial thermocompression bonding.

A method for manufacturing a porous layer of an acoustic attenuation structure, porous layer of an acoustic attenuation structure thus obtained and acoustic attenuation structure comprising the porous layer. A method for manufacturing a porous layer of an acoustic attenuation structure includes a first step of production of a solid layer including at least one structural frame embedded in a resin matrix and having first and second reinforcing strips arranged so as to delimit zones without reinforcing strips and a second step of production of through-holes in the zones without reinforcing strips of the solid layer using a laser beam.

The present invention is directed to an improved gypsum board, such as an improved sound damping gypsum board. The gypsum board comprises a gypsum core including gypsum and a sound damping polymer. The gypsum core includes a first gypsum layer surface and a second gypsum layer surface opposing the first gypsum layer surface. In addition, a first encasing layer is disposed on the first gypsum layer surface and a second encasing layer is disposed on the second gypsum layer surface.

A paneling element for a vehicle interior compartment has a carrier element (12) and a sound-reducing element (14) arranged on a surface (42) of the carrier element (12). The surface (42) of the carrier element (12) has at least one access region (19) that faces the sound-reducing element (14). The sound-reducing element (14) has an access opening (18) through which the access region (19) can be accessed. The sound-reducing element (14) has a cantilevered tongue (24) that can close the access opening (18) in the unmounted state of the sound-reducing element (14). The cantilevered tongue (24) is folded over in the mounted state of the sound-reducing element (14) so that the access opening (18) is opened.

There is provided an automobile component capable of improving sound absorption performance by damping due to vibration of a thin film as well as reducing weight of the automobile component. An automobile component of the present invention includes a core layer 10 in which tubular cells 20 are arranged in a plurality of rows, and a nonwoven fabric layer 30 on one or both surfaces of the core layer. The cells have closed surfaces 21 and open ends 22 in every other row as cell ends on one surface of the core layer. As cell ends on the other surface of the core layer, the cells have open ends 22 in the rows where the cells have the closed surfaces as cell ends on the one surface, and have closed surfaces 21 in the rows where the cells have the open ends as cell ends on the one surface. The open ends 22 allow the internal space of the cells 20 to be in communication with the outside. A thin resin film layer 40 having a plurality of apertures is provided between the core layer and the nonwoven fabric layer. A ratio S is set so that 0<S<0.3, where S represents a ratio of an area of the apertures provided in the resin film layer corresponding to an opening defined by the open end to an area of the opening.

Provided in the present application are an acoustic reinforcing material block and an application thereof, a micro loudspeaker and an electronic device. The raw materials of the acoustic reinforcing material block include a porous material, an adhesive, and an adjuvant loaded in a structural framework. The micro loudspeaker comprises an upper housing and a lower housing which form an inner cavity, and a loudspeaker unit located in the inner cavity, wherein the inner cavity is divided into a front cavity and a rear cavity, and the front cavity is in communication with a sound outlet hole; and a front cavity resonant cavity which is in communication with the front cavity and filled with an acoustic enhancing material is provided in the upper housing.

There is provided an automobile component capable of improving sound absorption performance by damping due to vibration of a thin film as well as reducing weight of the automobile component. An automobile component of the present invention includes a core layer 10 in which tubular cells 20 are arranged in a plurality of rows, and a nonwoven fabric layer 30 on one or both surfaces of the core layer. The cells have closed surfaces 21 and open ends 22 in every other row as cell ends on one surface of the core layer. As cell ends on the other surface of the core layer, the cells have open ends 22 in the rows where the cells have the closed surfaces as cell ends on the one surface, and have closed surfaces 21 in the rows where the cells have the open ends as cell ends on the one surface. The open ends 22 allow the internal space of the cells 20 to be in communication with the outside. A thin resin film layer 40 having a plurality of apertures is provided between the core layer and the nonwoven fabric layer. A ratio S is set so that 0<S<0.3, where S represents a ratio of an area of the apertures provided in the resin film layer corresponding to an opening defined by the open end to an area of the opening.

A glass sheet composite includes a first glass sheet, a second sheet disposed opposite the first glass sheet, and a liquid layer formed by sealing up a liquid between the first glass sheet and the second sheet, in which the glass sheet composite has a plurality of vibration areas that are independent of each other in a plan view. The glass sheet composite is a diaphragm including at least one vibrator disposed on one side or both sides of the glass sheet composite. The glass sheet composite enables independent vibration at each of the vibration areas, and enables not only stereophonic or multiphonic reproduction but also local reproduction to be performed along with images. Since the diaphragm includes a vibrator, this diaphragm is excellent in sound reproduction.