Estudo do método das guias de ondas digitais na acústica
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Data
2019-07-15
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Universidade Federal de Goiás
Resumo
One of the important aspects of acoustics is acoustic comfort. In this way, in the quest for acoustic quality, the objective of this work is to study the digital waveguide method for the one-dimensional and two-dimensional wave solution. The first approach of the work focuses on the understanding of the simulation method and the boundary conditions. With the initial rationale established for the one dimensional parameters, it focuses on the two-dimensional case with modeling tests using the Taylor series and checks for dispersion errors at the border of an environment. In the implementation process, the perception of the influence of the acoustic impedance was also a very important variable for the work, since the energy or pressure of a node or joint is influenced by the neighborhood. Comparing the numerical method of study with analytical method it is realized that the relation of frequency of simulation on the frequency of excitation of the source must be at least 10 so that it presents reliable results. In addition, it was verified that when this condition is met, the preferred direction to have the lowest dispersion error for a sound wave occurs at 45º.
Descrição
Palavras-chave
Equação da onda, Guia de ondas digitais, Onda sonora, Wave equation, Digital wave guide, Sound wave
Citação
PEIXOTO, Breno Lobo Netto. Estudo do método das guias de ondas digitais na acústica. 2019. 82 f. Trabalho de Conclusão de Curso (Graduação) - Escola de Engenharia Elétrica, Mecânica e de Computação, Universidade Federal de Goiás, Goiânia, 2019.