In a sound absorption panel formed by stacking a plate perforated with a hole having a hole size smaller than a fiber length such as expanded metal, a honeycomb material, and felt-like fiber between the perforated plate and the honeycomb material, and joining the perforated plate, the felt-like fiber, and the honeycomb material to each other with an adhesive, the adhesive applied to the perforated plate is permeated into a surface of the felt-like fiber exposed from the hole to fix the fiber on the surface.

An acoustical treatment assembly includes an absorption panel and a diffusion panel that may be removably mounted to the absorption panel. The absorption panel has a first surface, an opposite second surface and a plurality of edge surfaces. The absorption panel has channels defined in either or both of the second surface and the edge surfaces. Each channel has a seat spaced apart from the first surface and the second surface, in which is disposed a magnet. The diffusion panel has a first surface, a second surface and a plurality of interior openings extend from and through the first surface and the second surface. The diffusion panel is formed of a material having a lower audio absorption than the absorption panel. Additional magnets are mounted on the diffusion panel that cooperate with magnets of the absorption panel to removably retain the diffusion panel adjacent to the absorption panel.

The disclosure relates to acoustic panels and methods for preparing them. The disclosure relates more particularly to panels having a nonwoven facing and to methods for making such panels. One aspect of the disclosure is a method for preparing an acoustic panel comprising providing a base structure. The base structure has one or more edges, an outward major surface having a total are, and an inward major surface opposing the outward major surface. The base structure has a noise reduction coefficient (NRC) of at least about 0.3. The method includes disposing directly against the outward major surface of the base structure a sprayable mixture comprising a plurality of fibers, one or more binders, and a dispersive medium. The method includes drying the disposed mixture to provide a facing layer disposed on the outward major surface of the base structure, the facing layer having an exterior major surface opposing the outward major surface of the base structure.

A panel coating system for simple and efficient installation of a removably attachable layer to a panel.

Some embodiments of present disclosure are directed to a micro-perforated glass or glass-ceramics laminate, comprising a first substrate laminated to a second substrate by a first polymer interlayer, wherein the first and the second substrates are independently selected from glass or glass-ceramics, and a plurality of micro-perforations, each of the plurality of micro-perforations extending through the first substrate, the first polymer interlayer, and the second substrate. Some embodiments are directed to methods of forming such micro-perforated glass or glass-ceramics laminates.

The disclosure relates to acoustic panels and methods for preparing them. The disclosure relates more particularly to panels having a nonwoven facing and to methods for making such panels. A method for preparing an acoustic panel comprises providing a base structure. The base structure has one or more edges, an outward major surface having total area, and an inward major surface opposing the outward major surface. The base structure has a noise reduction coefficient (NRC) of at least about 0.3. The method includes disposing directly against the outward major surface of the base structure a sprayable mixture comprising a plurality of fibers, one or more binders, and a dispersive medium. The method includes drying the disposed mixture to provide a facing layer disposed on the outward major surface of the base structure, the facing layer having an exterior major surface opposing the outward major surface of the base structure.

An acoustic insulation product includes a panel made of porous material, based on foam or fibres, including a first face, referred to as back face, intended to face towards a wall, and a second face, referred to as front face, situated on the opposite side to the back face, and a layer, referred to as backing layer, which adheres to or is linked or coupled at least in part to the back face of the panel made of porous material, the backing layer having an airflow resistance of between 5 kPa.Math.s/m and 20 kPa.Math.s/m.

A panel with one or more perforations, having a front surface, wherein the contrast Cm between the front surface and the one or more perforations is less than 0.3, a sound absorbing system including a panel and a masking layer, wherein the masking layer is air permeable, and the use of the panel or the sound absorbing system.

An example acoustic tile is disclosed having a structure with at least one layer. A plurality of openings are formed in the at least one layer of the structure. The openings are configured to direct sound waves hitting the structure in multiple different directions through the at least one layer to absorb a majority of the sound waves and inhibit the sound waves hitting the structure from reflecting off of the structure. In an example, the openings are juxtaposed, different sizes, different orientations, and/or different numbers of openings on separate layers.

A noise reduction apparatus can include a frame and multiple spaced apart panels positioned adjacent to each other. Each of the panels or only one of the spaced apart panel elements may have holes therein to receive acoustic waves for absorbing the waves between the panels. The panels can be attached to a frame or other connection structure so that the arrangement of panels can be hung over a work space or positioned in a work space (e.g. in a wall, formed as a partition or wall, included as part of shelving, etc.). The panels can also be incorporated into a light fixture that may hang from a ceiling or be attached to some other type of support (e.g. a table, a base, etc.). The panels can be composed of glass, wood, or other type of material.