公开(公告)号：US4253543A

公开(公告)日：1981-03-03

申请号：US3860

申请日：1979-01-16

Applicant: Bengt R. Johansson

Inventor： Bengt R. Johansson

IPC: G10K11/16 ,  E04B1/82 ,  B32B3/00 ,  B32B3/26

CPC classification number: G10K11/16 ,  Y10T428/24512 ,  Y10T428/24612 ,  Y10T428/24661 ,  Y10T428/24802 ,  Y10T428/249992

Abstract: Device for absorption of airborne sound, comprising a rigid, air permeable and self-supporting carrying layer having a flexible, air impermeable membrane applied thereto. The device is characterized in that the carrying layer has an air flow resistance of less than 10,000 Pas/m, that the layer has a thickness of 1-60 mm, preferably 5-20 mm, and that at least one surface of the layer is provided with a relief pattern. The device is further characterized in that a flexible membrane having a surface weight of less than 2 kg/m.sup.2 is firmly attached to the carrying layer by gluing or the like. The membrane is resting on the upper parts of the relief pattern, whereby an air gap is obtained between the membrane and the lower parts of the relief pattern.

Abstract translation: 用于吸收空气传播声音的装置，包括刚性的透气和自承载层，其具有施加到其上的柔性不透气膜。 该装置的特征在于，承载层的气流阻力小于10,000Pa·s / m，该层的厚度为1-60mm，优选为5-20mm，并且该层的至少一个表面为 提供浮雕图案。 该装置的特征还在于，具有小于2kg / m 2的表面重量的柔性膜通过胶合等牢固地附着在承载层上。 膜位于浮雕图案的上部，由此在膜和浮雕图案的下部之间获得气隙。

公开(公告)号：US4458779A

公开(公告)日：1984-07-10

申请号：US391244

申请日：1982-06-23

Applicant: Bengt R. Johansson ,  Lennart H. Slycke ,  Gote V. Norrbrand

Inventor： Bengt R. Johansson ,  Lennart H. Slycke ,  Gote V. Norrbrand

IPC: C04B38/00 ,  F01N1/10 ,  F01N1/24 ,  F01N13/16 ,  F01N13/18 ,  F01M1/10

CPC classification number: F01N13/16 ,  C04B38/00 ,  F01N1/10 ,  F01N1/24 ,  C04B2111/52 ,  C04B2201/00 ,  C04B2201/40 ,  F01N2470/02 ,  F01N2470/24

Abstract: A silencer comprising one or more sound-absorbing parts of ceramic material. The ceramic material is porous and the sound-absorbing parts are self-supporting and have a specific resistance to air flow of 10.sup.3 -10.sup.7 Pas/m.sup.2 and a compression strength of at least 40 kN/m.sup.2, preferably at least 400 kN/m.sup.2.

Abstract translation: 一种消音器，包括一个或多个陶瓷材料的吸声部分。 陶瓷材料是多孔的，吸声部分是自支撑的，并且具有103-107Pas / m 2的空气流动的特有阻力，并且压缩强度至少为40kN / m 2，优选至少为400kN / m 2。