Análise da resposta de frequência sonora de violões clássicos

Autores

DOI:

https://doi.org/10.33871/23179937.2023.11.2.7762

Palavras-chave:

Violões Clássicos, Transformada de Fourier, Transformada Contínua Wavelet, Processamento de sinal

Resumo

A avaliação da qualidade sonora do instrumento é uma tarefa árdua de ser realizada computacionalmente. Este trabalho visa comparar características de qualidade entre instrumentos. A resposta ao impulso do violão é registrada no domínio do tempo e, por meio das Transformada Rápida de Fourier e a Wavelet Contínua, no domínio da frequência, são interpretadas as características de qualidade. Para discriminar alta qualidade, por meio da experimentação, os critérios são: 1) afinação das notas, projeção sonora e definição das notas; 2) equilíbrio sonoro em todas as frequências e timbres. A comparação da resposta de frequência (intensidade, densidade, forma, alcance) oferece boa informação quanto às características essenciais de qualidade dos instrumentos, de acordo com os critérios aqui definidos. Note que, entre os violões clássicos de alta qualidade, não é possível definir qual é o melhor de todos porque depende da percepção pessoal de qualidade do músico.

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Biografia do Autor

Milton Ernesto Romero Romero, Universidade Federal de Mato Grosso do Sul

Milton Ernesto Romero Romero holds a postdoctoral position at the Autonomous University of Barcelona, Spain (2011); a Ph.D. in Systemistic Engineering and Computer Science from the University of Rome La Sapienza (1999), Italy; a Master's degree in Electrical Engineering from the Pontifical Catholic University of Rio de Janeiro (1988); a Bachelor's degree in Mechanical Engineering from the National University of Colombia (1982); and a Bachelor's degree in Electronic Engineering from the Pontifical Javeriana University of Colombia (1983). He worked at IBM as a researcher at the scientific center in RJ-Brazil, and at Quadrics in the field of supercomputing in Rome, Italy. Currently, he holds the position of full professor at the Federal University of Mato Grosso do Sul. He has expertise in the areas of Electronic Engineering and Computer Engineering, with an emphasis on Computing Methodology and Techniques, focusing primarily on the following topics: binary and multiple-valued digital circuits, signal processing, Clifford algebras, high-performance computing, parallel computing, and stereoscopic processing.

Rafael Pedrosa Salgado, Universidade Federal de Mato Grosso do Sul\ Universidade do Estado de Santa Catarina

Rafael Pedrosa Salgado is a PhD candidate in Music at UDESC, specializing in creative processes. He earned a Master's degree in Music from UNESP, focusing on musical performance - Chamber Music (2015). He holds a Bachelor's degree in Music - Bachelor of Science from the Faculty of Sciences at FITO (2003), as well as a Bachelor's degree in Music Education from the Faculty of Sciences at FITO (2004). Currently, he serves as a musician-technician at the Federal University of Mato Grosso do Sul.

Evandro Mazina Martins, Universidade Federal de Mato Grosso do Sul

Evandro Mazina Martins received the B.S. degree from the Mackenzie University, Sao Paulo, Brazil, in 1981, and the M.Sc. and Ph.D. degrees from the State University of Campinas, Campinas, Brazil, in 1996 and 1999, respectively. He has been a Professor at the Federal University of Mato Grosso do Sul, Campo Grande, Brazil, since 1989 and Titular Professor since 2015. His research interests include high-speed A/D converter, digital signal processing, multiple-valued logic algebra and quantum computation.

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Publicado

06.09.2023

Como Citar

Romero Romero, M. E. ., Pedrosa Salgado, R., & Mazina Martins, E. (2023). Análise da resposta de frequência sonora de violões clássicos. Revista Vórtex, 11(2), 1–31. https://doi.org/10.33871/23179937.2023.11.2.7762

Edição

v. 11 n. 2 (2023): Revista Vórtex

Seção

Artigos

Licença

Copyright (c) 2023 Milton Ernesto Romero Romero, Rafael Pedrosa Salgado, Evandro Mazina Martins

Creative Commons License
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.

Autores mantêm os direitos autorais e concedem à revista o direito de primeira publicação, com o trabalho simultaneamente licenciado sob a Licença Creative Commons Attribution que permite o compartilhamento do trabalho com reconhecimento da autoria e publicação inicial nesta revista.