Aplicación del método de medición de pérdida por transmisión de acuerdo a la norma ASTM E2611-09 incluyendo un quinto micrófono de medición como referencia para estimar parámetros acústicos como la pérdida por transmisión y los coeficientes de absorción y reflexión
Different materials produced in the national industry for acoustic design and noise control are implemented in Colombia. Those materials behavior and their interactions with sound waves should be known to the well development of this project. Therefore, this paper intends to apply the method establi...
| Autor Principal: | Gómez Salazar, Juan Camilo |
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| Formato: | info:eu-repo/semantics/bachelorThesis |
| Idioma: | spa |
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Ingenierias
2017
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| Acceso en línea: |
[1] J. C Gómez Salazar, “Aplicación del método de medición de pérdida por transmisión de acuerdo a la norma ASTM E2611-09 incluyendo un quinto micrófono de medición como referencia para estimar parámetros acústicos como la pérdida por transmisión y los coeficientes de absorción y reflexión.”, Trabajo de grado Ingeniería de Sonido, Universidad de San Buenaventura Medellín, Facultad de Ingeniería, 2017. |
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| Sumario: |
Different materials produced in the national industry for acoustic design and noise control are implemented in Colombia. Those materials behavior and their interactions with sound waves should be known to the well development of this project. Therefore, this paper intends to apply the method established in the standard ASTM E2611-09 with the objective of presenting measurements to obtain acoustic parameters of the materials as: transmission loss, absorption and reflection coefficients. Different tests were performed on the transmission tube system, making a modification that was based on the implementation of a fifth measurement microphone in its initial stage. Audio samples were obtained to be processed in the algorithm that allowed to characterize the different materials. Besides, variations were made in the assembly, and it was found that those materials are sensitive to changes in the variables present in the system. Additionally, the design of a measurement protocol was carried out in order to maintain a stability in methodology and results. The transmission loss values obtained were compared with the project that designed the system. It made possible to find that modifying the system allows getting results that are close to the theoretical curve and for this acoustic property it gives an improvement in the coherence between the signals. Based on the compared and validated values, the other acoustic parameters were obtained in which the absorption coefficient was compared with the materials data already characterized. Finally, it was concluded that the method achieves different acoustic parameters, but does not correctly and completely describe the behavior of all properties such as the absorption coefficient. In the same way, it was established that the method is a possible alternative for the acoustic characterization of materials. |
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