how does double glazing work?

Question

how does it reduce noise pollution?

Answer 1

Double glazing has two panes of glass fixed into a frame at the perimeter and separated by a gas across the open surface area. Compared to single glazed windows which have only a single pane of glass.
When a sound wave hits one pane of glass, it vibrates and transfers some of the energy into the gas on the other side. For a single pane, that's either the room for outside noise, or the outside air for inside noise. With double glazed windows the sound is transferred into the gas between, which is significant attenuation, the second pane vibrates and reflects some energy and transmits some energy with even more attenuation. The reflected energy will cause cancellation of some of the energy coming from the first pane, which further attenuates the noise.

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Answer 2

Double Glazing keep the elements outside – while you’re warm and comfortable inside your home or office. To know more visit the tread: http://www.nzglass.co.nz/double-glazing