V.L. Murzinov, Dr. Sci. (Eng.), Prof., dr.murzinov@yandex.ru P.V. Murzinov, Cand. Sci. (Eng.), Laboratory Head FGBOU VO Voronezh State Technical University, Voronezh, Russia
At present for noise control a lot of sound protective materials and structures are used, which can be conventionally divided into three groups. Sound proof materials with soft structure, sound proof structures with rigid framework and soft filler, sound proof structures with rigid framework. As the analysis showed concerning these materials and structures characteristics, at the present day there are no sound proof panels with rigid framework and soft filler, and also panels with rigid framework, which area density does not exceed 2 kg/m2.
For convenience of efficiency comparison of acoustic indicators of materials and structures the coefficients of sound insulation and sound absorption are used.
Sound absorption lighted structured panel is developed, which area density does not exceed 2 kg/m2. This panel can be used for decrease in aerodynamic noise, for example in transportation devices on air cushion — pneumatic conveyors. This panel is used to create comfortable conditions in the office premises of design organizations in Voronezh and OOO kholdingovaya kompaniya «Mebel Chernozemya» for noise screening of the working equipment. The results of application are confirmed with test reports.
It is important to note that for production of the developed panels it is required to use plate material, which does not posess elastic properties, have big coefficient of sound absorption, well processed by mechanical methods. Besides, the formula is obtained for determination of minimum possible size of plate materials, which can be used for production of the sound absorption lighted structured panels.
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