How Window and Door reduce noise?
Everyone deserves to live their best, healthiest life.

The WELL Sound concept aims to bolster occupant health and well-being through the identification and mitigation of acoustical comfort parameters that shape occupant experiences in the built environment.

Sound masking levels do not exceed 48 dBA in open areas with Quiet zones and/or Circulations zones and 42 dBA in enclosed rooms labeled as Quiet zones.

The importance awarded to noise control is demonstrated by DIN 4109. This standard sets out sound insulation requirements for windows and doors and stipulates the minimum standards to be observed by builders. Altogether, there are six noise protection classes for doors and windows. The principle here is that an acoustical window must reduce noise pollution by a defined amount.

Noise protection class 1: the thickness of the glazing in these doors and windows is 4 millimetres. The DIN standard requires that an acoustical window in this class reduces noise pollution by 25 - 29 decibels. This version concerns windows with single glazing.

Noise protection class 2: to achieve sound insulation of 30 - 34 decibels, the acoustical window has two 4-millimetre thick glazing panes. Between the individual panes is an air gap approximately 16 mm thick filled with argon or another gas.

Noise protection class 3: these windows also feature two glazing panes. However, in this case, the outer pane is 6 mm thick, and the inner pane is 4 mm thick. The space between them is filled with a gas mixture. These windows achieve a sound insulation of 35 - 39 decibels.

Noise protection class 4: to achieve a sound insulation of 40 - 44 decibels, this acoustical window must have an outer glazing thickness of 9 millimetres with an inner glazing thickness of 6 millimetres. In addition to the gas filling, a PVC foil is also applied to further reduce noise pollution significantly.
 
Noise protection class 5: with a sound insulation of 45 - 49 decibels, this noise protection class is particularly well suited to factory buildings and other very loud environments. The two panes have a thickness of 11.5 and 9.5 millimetres and in addition they are cladded with foil. The gap between the panes is 20 millimetres wide.
 
Noise protection class 6: These acoustical windows are 'box' windows and provide a noise reduction of over 50 decibels.