A ceiling system is provided for use in a building space. The ceiling system has an open cell grid structure and is attached to a support structure of the building via hanging hardware. The open cell grid structure is constructed of a plurality of first panels attached to the hanging hardware, a plurality of second panels attached to the plurality of first panels, and a plurality of third panels attached to the plurality of second panels. The first, second, and third panels are attached via a plurality of slots which allow secure engagement and utilize gravity to retain them in the assembled condition. Beneficially, the plurality of second panels and the plurality of third panels are free of hanging hardware.

A soundproof structure includes two or more different kinds of resonant type sound absorbing cells, and an opening part. The opening part is disposed in a position in contact with both two resonant type sound absorbing cells of the two or more different kinds of resonant type sound absorbing cells, or the two resonant type sound absorbing cells are adjacent to each other, and the opening part is disposed in a position adjacent to at least one of the two resonant type sound absorbing cells. Resonance frequencies of one kind of first resonant type sound absorbing cells and resonance frequencies of the other kind of second resonant type sound absorbing cells different from the first resonant type sound absorbing cells match each other. As a result, this soundproof structure can achieve an absorbance of more than 50%, preferably, close to 100% even in a compact, light, and thin structure which is much smaller than a wavelength, and can achieve air permeability, heat conductivity, and a high soundproofing effect by providing a passage of air.

An exemplary inventive acoustic wall panel includes a pair of congruent flat rectangular plates and a housing. The two plates adjoin at their respective vertical edges to form an angle between the two plates, wherein 90<180. Each plate has a material characteristic relating to acoustic reduction through the plate. Design of an inventive wall panel includes selection of the angle and the respective plate materials, with an objective of producing counteractive acoustic vibratory motions in the two plates in response to sound waves impinging upon the inventive wall panel. Acoustic vibratory motion is induced in each plate whereby the respective vibratory motions tend to oppose each other, thereby reducing sound transmission across the inventive wall panel. The housing lends support to the two attached plates and facilitates connection of the inventive wall panel to another inventive wall panel or to a different structure.

A carriage is disclosed for moveably supporting an acoustical panel. The carriage comprises a frame having rolling members for movably for supporting the acoustical panel. A first and a second pair of support legs extend angularly from the frame for enabling a plurality of carriages to orientate acoustical panels in a linear or angular relationship. Each of the unique acoustical panels provides sound absorption as well inhibiting sound transmission.

A ceiling system is provided for use in a building space. The ceiling system has an open cell grid structure and is attached to a support structure of the building via hanging hardware. The open cell grid structure is constructed of a plurality of first panels attached to the hanging hardware, a plurality of second panels attached to the plurality of first panels, and a plurality of third panels attached to the plurality of second panels. The first, second, and third panels are attached via a plurality of slots which allow secure engagement and utilize gravity to retain them in the assembled condition. Beneficially, the plurality of second panels and the plurality of third panels are free of hanging hardware.

A soundproof structure includes two or more different kinds of resonant type sound absorbing cells, and an opening part. The opening part is disposed in a position in contact with both two resonant type sound absorbing cells of the two or more different kinds of resonant type sound absorbing cells, or the two resonant type sound absorbing cells are adjacent to each other, and the opening part is disposed in a position adjacent to at least one of the two resonant type sound absorbing cells. Resonance frequencies of one kind of first resonant type sound absorbing cells and resonance frequencies of the other kind of second resonant type sound absorbing cells different from the first resonant type sound absorbing cells match each other. As a result, this soundproof structure can achieve an absorbance of more than 50%, preferably, close to 100% even in a compact, light, and thin structure which is much smaller than a wavelength, and can achieve air permeability, heat conductivity, and a high soundproofing effect by providing a passage of air.

The invention concerns a wall element including a felt panel that has at least two felt layers, with at least one felt layer having a three-dimensional structure on at least one top side. The felt panel includes as its top layer a plane felt layer, as its bottom layer a plane felt layer, and as its middle layer at least one corrugated felt layer. The corrugated felt layer bordering on the top layer is connected to the top layer on its top side in the region of upper vertex lines or vertex points formed by its wave peaks. The corrugated felt layer bordering on the bottom layer is connected to the bottom layer on its bottom side in the region of lower vertex lines or vertex points formed by its wave valleys.

A component for producing building parts has two outer parts arranged at a distance from one another and at least one inner part arranged between the outer parts. The inner part has at least one first part adjacent to an outer part and a second part adjacent to the upper outer part, which has at least one vibration-capable leg, which projects from a third part connecting the first part to the second part, is spaced from the first part by at least one slot and on its side facing away from the first part has at least one recess, which is bridged by the upper outer part and delimited at one end by a projection that has a contact surface, on which the upper outer part is mounted, so that an overall vibration-capable mounting results for the one outer part, leading to a decoupling of structure-borne sound.

A building material configured to enhance sound attenuation and reduction in dB across a walled partition, the building material comprising a facing membrane, a core matrix disposed about the facing membrane, the core matrix comprising a plurality of microparticles and a binder solution configured to support the microparticles, the building material comprising at least a substantially exposed face, wherein a side of the core matrix is at least partially exposed to increase sound attenuation by reducing reflections from sound waves impinging on the building material as compared to a control building material lacking an exposed face. Two building materials may be used in conjunction with one another about a building structure, such as a stud wall, to create and define a sound trap that functions to reduce sound transmission across the partition formed by the stud wall and building materials.

A wall mounting device may include a wall panel, the wall panel including a sound absorbing material. A wall mounting device may include a frame coupled to the wall panel completely covering the frame. A wall mounting device may include a hanger bar device fixedly connected to a wall. The hanger bar device may include a hanger bar fixedly connected to the frame and a coupling member fixedly connected to the wall, wherein the wall panel is configured to absorb classroom noise, wherein the wall panel is configured to be tackable.