Metody obliczeniowe wyznaczania izolacyjności akustycznej dwuwarstwowych przegród dźwiękoizolacyjnych
Computational methods of sound insulation of two-layer sound insulating baffles

Summary/Abstract: In reducing the excessive noise level, especially at workplaces, sound insulating baffles are used, which can be used individually or are used as a structural element of the wall of sound-absorbing and insulating enclosures. Knowledge of acoustic parameters of such baffles is very useful at the stage of designing or forecasting the effectiveness of anti-noise solutions. The paper presents selected methods of calculating acoustic insulation of single partitions, consisting of two layers of materials with sound insulating properties. In addition to using the mass law model and commercial software, a new approach has been proposed in calculating the insulation of single heterogeneous two-layer baffles, consisting in the modification of the well-known Davy model. Verification of computational methods was carried out on the example of six rubber and metal plates, whose acoustic insulation was determined in laboratory conditions as part of earlier tests.

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