They are widely used equipment when it is necessary to reconcile acoustic insulation and natural ventilation.
They function as ventilation and exhaust systems, in which there are also plates made of noise-absorbing materials, positioned as barriers or passages, depending on the required air flow velocity in each case.
The most common and easiest to construct are the passive ones: the ones of sequence of acoustic barriers, the ones of passage and the mixed ones.
There are also active attenuators, whose principle consists in the electronic identification of the noises and in the emission of waves that cancel the effect of these.
Arch-Tec designs, manufactures and installs the attenuators according to each specific case, always complying with national and international technical standards.