Sound consists of pressure waves in the air, of which the intensity can be measured at different wavelengths or frequencies (number of cycles per second). The human ear is particularly sensitive to sounds with frequencies between 500 and 8,000 Hz and furthermore responds in a non-linear manner.

Consequently, in order to measure the acoustic pressure level, reference is made to a logarithmic scale with the threshold of audibility as its origin. The unit of measure is the decibel (dB).

The human ear also has varying degrees of sensitivity depending on frequencies

The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. Its original intent was to quantify interior building partitions, not exterior wall components. As a result, it is not recommended for glass selection of exterior wall applications since the single-number rating was achieved under a specific set of laboratory conditions

The OITC (Outside-Inside Transmission Class) rating is used to classify the acoustic performance of glazing in exterior applications

AluFab Metals achieved the highest noise insulation using an acoustic laminated glass.Glass controls noise by:

  • Reflecting the noise back towards the source, and
  • Absorbing the noise energy within the glass.

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).


Typical Applications of these Soundproof Studio Windows:

  • Recording Studios
  • Commercial Windows
  • Industrial
  • Military
  • Victim/Interrogation Room