Noise and thermal insulation

Discover how acoustic glass can improve your confort at home.

Sound insulation

Noise pollution is a real problem for crowded area: air trafic, busy roads... However with acoustic glass you can protect your home from this disturbance and reduce noise pollution thanks to double glazing window!

Noise explained

Sound, a form of energy, is caused by molecules vibrating in a gas, liquid or solid. These vibrations are known as sound waves.

The frequency or pitch of a noise, measured in hertz, is the number of sound waves emitted per second. High pitched sounds are carried by short sound waves and low pitched noises by longer waves.
The actual level or intensity of noise is measured in decibels (dB).

Improving acoustic insulation

Acoustic insulation works by reducing a sound wave’s energy with acoustic glass. The acoustic insulation properties of a window are measured with the ‘R’ sound reduction index. For example, a window with an R of 20 decibels should reduce a 60 dB outside traffic noise level to 40 dB within the room.

Noise pollution can be in any combination of low, medium or high frequency sounds. Some types of frequencies are easier to block or reduce. High pitched sounds (carried by short sound waves) are easier to absorb but reducing low frequency noise such as traffic can be more difficult. It is important to select the acoustic insulation properties of the window required according to the frequency or pitch of the noise to be blocked, as well as the desired number of decibels to be reduced.

Improving the sound insulation of a double glazing window can be achieved by:
- Having the widest possible cavity between panes of glass
- Using thicker glass
- Differing the thicknesses of the two glass panes used
- Using an efficient insulating window frame
- Using specially laminated acoustic glass
Acoustic glass is a sandwich of two or more sheets of glass, heat or pressure bonded together with one or more acoustic polyvinyl butyral (PVB) interlayers. The interlayers act as a noise damper, weakening the energy of the sound waves as they travel through the acoustic glass.

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