The disclosure provides a slag wool composition including about 60 to about 80 wt. % blast furnace slag and about 20 to about 40 wt. % basalt, based on the total weight of the inorganic raw materials, wherein the composition has an A/B ratio in a range of about 1.20 to about 1.70. The disclosure further provides a slag wool produced using the slag wool composition of the disclosure, wherein the slag wool has a fiber diameter in a range of about 4.0 microns to about 10.0 microns. The disclosure further provides a method for the manufacture of slag wool.

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.

A sound absorbing structure (1) includes: a rear surface member (21) having a length in a predetermined direction; a front surface member (22) that is shorter in the predetermined direction than the rear surface member (21); and a sound absorbing material (3) that is placed in front of the rear surface member (21). The front surface member (22) is parallel to the rear surface member (21) and is separated forward from the rear surface member (21). An opening (23) is formed at a position adjoining the front surface member (22) in the predetermined direction. The sound absorbing material (3) is provided in both a first region (24) located behind the opening (23) and a second region (25) sandwiched between the front surface member (22) and the rear surface member (21).

A modular acoustic structure includes a number of joined acoustic wall panels and acoustic ceiling tiles positioned atop the joined acoustic wall panels. The joined acoustic wall panels define a doorless aperture in the modular acoustic structure, an internal chamber, and a straight acoustic hallway connecting the doorless aperture and the internal chamber via an internal aperture. The straight acoustic hallway absorbs soundwaves travelling between the doorless aperture and the interior chamber. The acoustic wall and/or ceiling panels may include an acoustic absorptive surface and an acoustic reflective surface. The acoustic properties of the interior chamber and/or the straight acoustic hallway may be altered or tuned by changing which of the surfaces faces an interior of the modular acoustic structure. The size of the interior chamber and/or the modular acoustic structure may be adjustable by adding and/or removing acoustic wall and/or ceiling panels.

A suspended ceiling comprising SUSPENDED metal runners in a horizontal plane, the runners each having a horizontal flange having an effective vertical thickness, a plurality of rectangular drywall sheets aligned crosswise to the runners and screwed to the flanges with ends of the drywall sheets forming butt joints midway between adjacent runners, boards overlying butt joints and adjacent flanges, the boards being substantially stiffer than the drywall sheets, whereby the drywall sheet ends are drawn up towards an upper level of the flanges when screwed against the overlying board so that a pseudo taper is formed on the drywall sheet ends.

A flooring product includes a first oriented strand board layer, an acoustic barrier layer, and a second oriented strand board layer, where the acoustic barrier layer is secured between the first and second oriented strand board layers to form the flooring product. The plurality of flooring products can be positioned adjacently to comprise a complete flooring assembly. Such a flooring assembly can be facilitated by including features along edges of the flooring product for securing or engaging one flooring product to adjacent flooring products. For example, the flooring product can be arranged with one edge as a tongue and an opposing edge as a groove, where the tongue of one flooring product can be fitted into the groove of an adjacent flooring product to secure or engage the two flooring products together. In another example, edges of the flooring products can be arranged to form lap joints upon engagement.

A composition for producing a sheet material with a cellular structure, the composition including the following components: (a) about 5 to about 25 weight % gelatine, (b) about 25 to 60 weight % filler material, (c) about 15 to about 40 weight % water, and (d) a cellular structure promoting agent.

A sound-absorbing membrane and a sound-absorbing material, which can improve sound absorbing performance and can improve releasability, are provided. A sound-absorbing membrane 10 includes a base sheet 11 made of a nonwoven fabric impregnated with a water-soluble polymer, and a resin film 12 made of a thermosetting resin covering one surface of the base sheet 11, in which a thickness of the resin film 12 is 0.01 to 0.2 mm, fillers 13 are dispersed in the resin film 12, and a whole airflow resistance is 0.2 to 5.0 kPa.Math.s/m. A sound-absorbing material 20 includes the sound-absorbing membrane 10, and a sound absorbing base sheet 21 made of a porous material, in which the sound-absorbing membrane 10 is laminated on a surface of the sound absorbing base sheet 21, and then formed into a predetermined shape.

Transparent or translucent sound diffusers include a first glass sheet of less than 0.8 mm thickness and a second glass sheet of less than 0.8 mm thickness with a transparent or translucent adhesive layer there between, the adhesive layer adhering the first and second sheets in a fixed configuration such that a first major surface of the first glass sheet has a smooth, repeatedly rising and falling shape. The diffusers are secured to a wall or ceiling or to a wall or ceiling mount or to a wall or ceiling panel.

In accordance with various embodiments, lighting systems features one or more inter-connectable light panels each having multiple light-emitting elements thereon. One or more of the light panels may feature one or more connectors, and associated conductors, for the transmission of power, communication signals, and/or control signals. One or more of the light panels may include sound-absorbing material therebelow and may define one or more apertures and/or cut-out regions that reveal the sound-absorbing material.