Excess noise pollution from traffic, trains, airlines and other sources in many areas is becoming a real issue . Our double or triple glazed units offer a high level of sound proofing, as good if not better than an average brick wall and a high level of insulation.
The desired acoustic performance can be achieved through various product combinations, depending on the specific noise reduction required.We can improve the sound insulation of glass in different ways – increasing the thickness of the pane, using laminated glass on its own or within an Insulating Glass Unit (the larger the gap between the panes, the better the insulation).
Sound reduction is generally classed in 3 ways:
C This is the mean average sound reduction in decibels (dB) across a range of frequencies.
Rw This is a weighted decibel reduction incorporating a correction for the human ears’ response to sound. It is more commonly used.
Ctr This is the decibel reduction for the specific sound frequencies of typical road traffic noise in towns and cities.
Most customers don’t tell us what noise reduction they are after but they will usually be Rw or Ctr (formerly Rtra) values. If we are given a dB reduction target value, we can usually put forward a specific sealed unit make up that will offer the required performance but take into account U-values and glazing possibilities.
Noise reduction in glazing is achieved by altering the frequency of noise travelling through the glass. This is done by varying the thickness of the sealed unit make up.