Sound Isolation WINDOW CONSTRUCTION WITH more layers of glass

摘要

1463132 Double glazed window B LUNDQUIST 18 Jan 1974 [18 Jan 1973] 02518/74 Heading E1R A double glazed window has panes of 4 to 8 mm. thickness separated by an air gap of 1 to 2 mm. and is constructed to have a resonant frequency in the range 500-800 Hz (preferably 630 Hz). A third pane may be secured thereto to define an air-gap of 20-50 mm. with the window.