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Air Vent Noise Suppressor
Категория: Инж. тех. м. и а. |
Новость от: Admin |
27-12-2005
It is known that acoustic insulation is approximately equal to 10 decibel for open apertures of light transmission protection in ventilation regime.
The device is designed according to certificate of authorship N1805203.
It allows us to increase acoustic insulation for more than 27 decibel in wide frequency range.
Light transmission protection looks as extensional chambers treated by sound absorbers, with inlets and outlets and enclosures. The latter is made as light transmission element (for example, two or three parallel glasses) the ends of which are perforated (the total area of perforation is equal to the area of air vent and window flap) and together with frame ledges – walls from the side walls of the expansion chamber.
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