The produced PVP/silica samples have better sound absorption properties, in the lower frequency range, than materials, of the same thickness. The purpose of this paper is to provide a theoretical model for predicting the sound absorption coefficient of PVP/silica samples. Starting from the knowledge of the physical properties (such as resistivity, porosity and the structure factor) measured for each range of particle size, by the application of a theoretical model, it is possible to obtain the coefficient of absorption of the tested material. Measurements of the absorption coefficient were made using an impedance tube (tube of Kundt). Then the theoretical developments were compared with the experimental ones in function of the frequency.
ACOUSTIC CHARACTERISTICS OF INNOVATIVE MATERIALS THROUGH ELECTROSPINNING
Gino Iannace;Giuseppe Ciaburro;
2020
Abstract
The produced PVP/silica samples have better sound absorption properties, in the lower frequency range, than materials, of the same thickness. The purpose of this paper is to provide a theoretical model for predicting the sound absorption coefficient of PVP/silica samples. Starting from the knowledge of the physical properties (such as resistivity, porosity and the structure factor) measured for each range of particle size, by the application of a theoretical model, it is possible to obtain the coefficient of absorption of the tested material. Measurements of the absorption coefficient were made using an impedance tube (tube of Kundt). Then the theoretical developments were compared with the experimental ones in function of the frequency.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
