A sound damping wallboard and methods of forming a sound damping wallboard are disclosed. The sound damping wallboard comprises a gypsum layer with a gypsum surface having an encasing layer. The encasing layer is partially removed to expose the gypsum surface and form a gypsum surface portion and a first encasing layer portion on the gypsum layer. A sound damping layer is applied to the gypsum layer to cover at least part of the gypsum surface portion and the encasing layer portion.

A sound damping wallboard for installation on an installed wallboard, a sound damping wallboard system, and a method of constructing a sound damping wallboard on a building structure are disclosed. The sound damping wallboard includes a gypsum layer having a gypsum layer inner surface and a gypsum layer outer surface, a first sound damping layer disposed at the gypsum layer inner surface and having a first sound damping layer inner surface opposite the gypsum layer inner surface, a first encasing layer disposed at the gypsum layer outer surface, a second encasing layer disposed at the first sound damping layer inner surface, and a second sound damping layer disposed at the second encasing layer opposite the first sound damping layer inner surface.

The disclosure relates to acoustic panels and methods for preparing them. The disclosure relates more particularly to panels having a porous facing and to methods for making such panels. One aspect of the disclosure is an acoustic panel comprising a base structure. The base structure has one or more edges, an outward major surface having a 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 panel includes a coating layer directly disposed on the outward major surface of the base structure, the coating layer being formed of an open-cell foam. The coating layer has an exterior major surface opposing the outward major surface of the base structure. The coating layer is substantially scattering for light in the wavelength range of 380 nm to 780 nm, and has an absorption coefficient of less than 0.5 for acoustic frequencies in the range of 100 Hz to 10,000 Hz.

The present invention addresses the problem of providing a sound insulating structure which provides a sufficient sound insulating effect even when an adhesive layer is arranged therein, and in which a shift in the frequency band where the sound insulating effect is generated is unlikely to occur. This sound insulating structure includes, at least: a sound insulating member that includes a sheet-like sheet section and plural projections arranged on the sheet section; and an adhesive layer arranged on a surface of the sheet section on the opposite side of the side provided with the projections, and the sound insulating structure satisfies the following Formula (1): E_glue/I_glue>0.5×(E_membrane/H)(1) (wherein, E_glue (MPa): storage modulus of adhesive layer, I_glue (mm): average thickness of adhesive layer, E_membrane (MPa): storage modulus of sheet section and projections, and H (mm): average height of sheet section and projections).

A sound damping wallboard for installation on an installed wallboard, a sound damping wallboard system, and a method of constructing a sound damping wallboard on a building structure are disclosed. The sound damping wallboard includes a gypsum layer having a gypsum layer inner surface and a gypsum layer outer surface, a first sound damping layer disposed at the gypsum layer inner surface and having a first sound damping layer inner surface opposite the gypsum layer inner surface, a first encasing layer disposed at the gypsum layer outer surface, a second encasing layer disposed at the first sound damping layer inner surface, and a second sound damping layer disposed at the second encasing layer opposite the first sound damping layer inner surface.

The present invention is an apparatus with detachable, interchangeable panels for varying acoustic and esthetic treatments or effects. Detachable, interchangeable panels are readily attached to and detached from a frame. By exchanging, combining, or removing panels, the absorptive character of the apparatus is altered. Selecting panel sets with more or less perforated surface area results in more absorptive or more reflective behavior, respectively. As such, the apparatus is easily altered to achieve specific gradations of absorption or diffusion. The unobtrusive structural components of the apparatus allow designs to be perforated directly into the panels without obstructions. Accordingly, the apparatus allows both visual and/or acoustic customization, and even exchange between the two. As a non-limiting example, the visual appearance of the panels is imprinted into the sonic character of the space, by the unique arrangements of perforations.

A partition assembly, for creating a partitioned space, includes a first partition wall panel and a second partition wall panel. The second partition wall panel is spaced apart from the first partition wall panel by an adjustable distance to form a cavity therebetween, whereby the partition assembly is tuned to mask sounds transmissible between the first and second partition wall panels within a selectable acoustical range.

A structure formed with a frame structure and a sheet of material configured to reduce sound is wrapped around or otherwise surrounds the frame structure to form a hammock, basket, meditation pod, animal bed, snore reduction unit, wearable enclosure or other small structure, with an inner, sound limited or reduced volume. The sheet of material includes a base layer and at least one layer of sound-absorbing material, at least one layer of sound barrier material, or both, provided on or integral with the base layer. The sound limited or reduced volume includes an opening that may be closed or partially closed with a flap, canopy or hood. The flap, canopy or hood is preferably made of the same material at the sheet of material surrounding the frame.

A sound-absorbing element and a sound-absorbing system comprising a fibrous material having the following properties is described: specific airflow resistance comprised between 527 and 1552 [Pa s/m]; and mass porosity comprised between 66% and 79%.

A soundproof underlayment membrane is disclosed. The membrane comprises a main layer having a given thickness made of a flexible material and a plurality of points extending from one of the surfaces of the main layer. The points are located on the surface in order to create an absorbing chamber between the main layer and an adjacent surface on which the membrane is placed, while reducing a surface of contact between floor coverings installed on the membrane and the adjacent surface. By combining at least two different structural elements, the membrane is particularly efficient for sound reduction in a construction such as the impact or structure borne noise (Impact Insulation Class—IIC) and the sound transmission or airborne sound (Sound Transmission Class—SCC). Compared to existing membranes in the fields, the present invention provides a light material, easy to manufacture, ship and install, while providing effective soundproof properties.