There is provided a ceiling baffle system having at least one ceiling support member and at least one baffle extending transversely relative to the at least one support member. The baffle has a baffle body portion with a baffle upper edge portion. At least one receiving slot extends from the upper edge into the body and receives the ceiling support member therewithin for coupling and suspending the baffle from the ceiling support member. At least one spacer extends parallel relative to the support member and has a spacer member body portion and a spacer member lower edge portion. At least one baffle retaining slot extends from the lower edge portion into the spacer member body portion. The baffle retaining slot receives at least the upper edge portion of the baffle to position, angularly orient and retain the baffle relative to the spacer member.

There is provided a ceiling baffle system having at least one ceiling support member and at least one baffle extending transversely relative to the at least one support member. The baffle has a baffle body portion with a baffle upper edge portion. At least one receiving slot extends from the upper edge into the body and receives the ceiling support member therewithin for coupling and suspending the baffle from the ceiling support member. At least one spacer extends parallel relative to the support member and has a spacer member body portion and a spacer member lower edge portion. At least one baffle retaining slot extends from the lower edge portion into the spacer member body portion. The baffle retaining slot receives at least the upper edge portion of the baffle to position, angularly orient and retain the baffle relative to the spacer member.

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.

An acoustic panel is provided. The acoustic panel may include a hidden mounting structure formed on the rear surface of the acoustic panel. The hidden mounting structure allows the acoustic panel to be used with substrates of any density, including substrates with a medium density of greater than 2 lbs. per cubic foot (pcf) and less than 6 lbs. pcf. In one particular embodiment, the acoustic panel may be used with substrates having a density of approximately 3 lbs. pcf. The acoustic panel may also include a cover formed from two or more materials having different acoustical and/or physical properties.

Described herein is an acoustic building panel comprising: a body comprising a fibrous material and having a first major surface opposite a second major surface and a side surface extending there-between, the fibrous material comprising polyester fiber in an amount of at least 70 wt. % based on the total weight of the fibrous material; wherein the body has a bulk density as measured between the first major surface, the second major surface, and the side surface, the bulk density ranging from about 4.8 lb./ft.sup.3 to about 6.0 lb./ft.sup.3.

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 method of reducing sound transmission in a building constructed using horizontal cross laminated timber (CLT) panels to provide a floor of the building and a floor assembly are described. In an implementation, the method includes: attaching a plurality of energy transmission control mounts to a ceiling side of one or more of the cross-laminated timber panels using fasteners; attaching a plurality of furring channels to the energy transmission control mounts; and attaching a cross laminated timber sheet to the plurality of furring channels to form an exposed ceiling layer.

Provided is a shield in which a flexible member is interposed between two metal plates; still unfilled spaces that are not filled with the flexible member are secured, so that the shielding properties are improved by air layers. The shield 1A includes two metal plates 2, 3 disposed to face each other, and a plate-shaped flexible member 4 interposed between the two metal plates. Each of the two metal plates 2, 3 has a plurality of protrusion-depression structures. Gap-forming means is provided to form gaps of a width greater than the thickness of the flexible member 4 between the two metal plates 2, 3 when the flexible member 4 is interposed therebetween. Unfilled spaces (5) that are not filled with the flexible member 4 are provided between the two metal plates 2, 3.

An acoustic seal for a sound flanking path between an an interior architectural separation and a mullion. The seal may be configured as an elongated rail having first and seal surfaces with adhesive elements disposed on laterally offset first and second adhesive-bearing portions thereof. When installed, the elongated rail can maintain a non-deformed state when opposing faces of the mullion and the architectural separation are separated by a distance equal to the elongated rail thickness. The elongated rail can assume a deformed state when the opposing faces of the mullion and the architectural separation are separated by a distance greater than the elongated rail thickness. In the deformed state, the longitudinal edges of the elongated rail become offset from each other in a direction normal to first and second seal surfaces. The elongated rail cross-section flexes proximate to first and second flex locations that may optionally include stress relief features.

An acoustic panel is provided. The acoustic panel may include a hidden mounting structure formed on the rear surface of the acoustic panel. The hidden mounting structure allows the acoustic panel to be used with substrates of any density, including substrates with a medium density of greater than 2 lbs. per cubic foot (pcf) and less than 6 lbs. pcf. In one particular embodiment, the acoustic panel may be used with substrates having a density of approximately 3 lbs. pcf. The acoustic panel may also include a cover formed from two or more materials having different acoustical and/or physical properties.