Acoustic Protection

Enjoy some peace and quiet. Sound insulation is becoming more important than ever in our increasingly hectic daily lives because the extent of nuisance noise is increasing at an alarming rate. Road traffic is particularly jarring on the nerves. Tolerance towards aircraft noise and neighbourhood noise is steadily decreasing. But you don’t have to put up with it. Weru sound insulated windows give noise plagued house and flat owners, rejuvenating peace and quiet.

The performance of insulation glass is significantly affected by the following factors:

• Weight (mass) of the pane: thicker panes are heavier. Owing to the high mass of the pane, it does not vibrate and reflects the sound waves that strike it. The heavier the pane is, the higher the sound insulation value is.
• Pane configuration: the more asymetric the thickness of the outer and inner pane of glass is, the higher the sound insulation value will be.
• Distance between panes: the wider this is, the higher the sound insulation value will be. However, if this is too wide, it adversely affects the thermal insulation performance.

In addition, Weru puts the effect of pane rigidity on the performance of the window to good use (the more resilient a component is, the higher the sound insulation value will be) and uses laminated glass with a sound insulation film. By using a resilient connection between the two individual panes the combination of a high pane mass with low flexural rigidity can be achieved. This significantly improves the sound insulation performance in the lower and upper-frequency range.

FOUR EXAMPLES OF SOUND-INSULATING GLAZING SYSTEMS BY WERU

Weru-KlimaTherm Phon Configuration: 6/12/4/12/4 Sound reduction index: 36 dB Filling: argon	Weru-KlimaTherm Extra Phon Configuration: 10/12/4/12/4 Sound reduction index: 38 dB Filling: argon
Weru-KlimaTherm Extra Phon SF Configuration: 9SF/12/4/12/10 Sound reduction index: 45 dB Filling: argon	Weru-KlimaTherm Extra Phon SF 2 Configuration: 13 13SF/12/4/12/9SF Sound reduction index: 48 dB Filling: argon

The important factors influencing the acoustic protection properties of windows are:

• The acoustic quality of window frames and sash frames
• The seal between the window frame and the sash frame
• The glazing
• The seal between the window frame and the masonry, i.e. the connection between the window and the structure

The difference 10 dB makes

If the noise level is reduced arithmetically by 10 dB, we perceive this as a 50% reduction in noise.

Conversely, when the noise level is increased by 10 dB, we perceive this as twice as noisy.

However, please note: If too much sound insulation is used, the noise in the interior may be perceived as unpleasant – consult your Weru specialist.