Numerical and experimental study of acoustic horns
Clebe Junior Tonial Vitorino1; Nilson Barbieri1; Renato Barbieri2; Key Fonseca de Lima1
1 Pontifical Catholic University of Paraná; 2 University of the State of Santa Catarina
doi:10.20906/CPS/COB-2015-1631
Resumo
Horns are acoustic elements specially designed for maximum transmission of sound pressure, for example, in sound systems (mainly external and warning equipment), musical instruments, cleaning apparatus, receivers and microwave transmitters. The focus of this work is to validate numerical models to simulate the acoustic behavior of horns. The acoustic behavior of horn is obtained by numerical simulation of mathematical models obtained by the finite element method and by experimental data. To obtain experimental data it was used the method of two microphones. The parameter used to compare the models was the reflection coefficient. The results obtained by comparing numerical and experimental data showed some divergences due to the numerical model limitation, but the results were good and show promise.
Palavras-chave: Acoustic Horn; FEM; Coefficient of Reflection; Sound Pressure