US 7,537,813 B2
Sound-insulating glazing with thermoviscous losses
Beatrice Mottelet, Compiegne (France); and Marc Rehfeld, Ezanville (France)
Assigned to Saint-Gobain Glass France, Courbevoie (France)
Appl. No. 10/520,514
PCT Filed Jul. 09, 2003, PCT No. PCT/FR03/02138
§ 371(c)(1), (2), (4) Date Sep. 22, 2005,
PCT Pub. No. WO2004/007886, PCT Pub. Date Jan. 22, 2004.
Claims priority of application No. 02 08937 (FR), filed on Jul. 15, 2002.
Prior Publication US 2006/0162280 A1, Jul. 27, 2006
Int. Cl. E06B 3/00 (2006.01); E04C 2/54 (2006.01); E04B 9/00 (2006.01)
U.S. Cl. 428—34  [181/289; 52/786.1; 52/786.13] 9 Claims
OG exemplary drawing
 
1. An acoustic insulating glazing unit comprising:
at least two substrate sheets, joined together around their periphery using a sealed joint/spacer frame, the sealed joint/spacer frame defining with the two substrate sheets a flat cavity that is filled with a gas;
an interior frame arranged inside the flat cavity in a periphery of the flat cavity,
wherein side walls of the interior frame and internal walls of the at least two substrate sheets define at least one microcavity having dimensions to form a zone of thermoviscous losses for acoustic waves entering from the flat cavity,
wherein the interior frame includes an inner chamber and opening slots that are arranged in the side walls of the interior frame, the inner chamber configured to receive the acoustic waves escaping from the at least one microcavity through the opening slots, and
wherein a height of the at least one microcavity from an upper wall of the interior frame to the opening slots is at least 6 mm, and the at least one microcavity has a width between 0.2 mm and 1 mm.