Double sound insulating glazing e.g. bar glazing, for e.g. building, has hollow section with length adapted such that section's resonant frequency does not deviate from values of glazing's radiance frequency defined by specific relation

摘要

The glazing (1) has an waveguide type acoustic damping system (3) disposed at interior of air filled tubular cavity e.g. rectangular shaped tubular cavity, defined between glass panels. The device has a polygon/curve shaped hollow section (30) open at its free end and including length adapted such that section's resonant frequency corresponds to or does not deviate from 150 hertz of glazing's radiance frequency defined by specific relation involving parameters such as gas density and velocity of the cavity, density and thickness of the panels and thickness of the cavity between the panels.