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Theoretical and Experimental Analyses on the Sound Absorption Coefficient of Rice and Buckwheat Husks Based on Micro-CT Scan Data
In this study, the sound absorption coefficients of rice and buckwheat husks were estimated. Computed tomography (CT) images were processed to determine the circumference and surface area of voids in the granular material, and the normal incident sound absorption coefficients were derived. In additi...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10456546/ https://www.ncbi.nlm.nih.gov/pubmed/37629962 http://dx.doi.org/10.3390/ma16165671 |
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author | Sakamoto, Shuichi Toda, Kentaro Seino, Shotaro Hoshiyama, Kohta Satoh, Takamasa |
author_facet | Sakamoto, Shuichi Toda, Kentaro Seino, Shotaro Hoshiyama, Kohta Satoh, Takamasa |
author_sort | Sakamoto, Shuichi |
collection | PubMed |
description | In this study, the sound absorption coefficients of rice and buckwheat husks were estimated. Computed tomography (CT) images were processed to determine the circumference and surface area of voids in the granular material, and the normal incident sound absorption coefficients were derived. In addition, the tortuosity, which expresses the complexity of the sound wave propagation through the structure, was measured for each material. The theoretical sound absorption coefficients were then compared to the measured sound absorption coefficients with and without consideration of the tortuosity. A correction factor was used to bring the surface area of the granular material closer to the actual surface area and observed that the tortuosity obtained theoretical values that matched the trend of the measured values. These results indicate that using CT images to estimate the sound absorption coefficient is a viable approach. |
format | Online Article Text |
id | pubmed-10456546 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-104565462023-08-26 Theoretical and Experimental Analyses on the Sound Absorption Coefficient of Rice and Buckwheat Husks Based on Micro-CT Scan Data Sakamoto, Shuichi Toda, Kentaro Seino, Shotaro Hoshiyama, Kohta Satoh, Takamasa Materials (Basel) Article In this study, the sound absorption coefficients of rice and buckwheat husks were estimated. Computed tomography (CT) images were processed to determine the circumference and surface area of voids in the granular material, and the normal incident sound absorption coefficients were derived. In addition, the tortuosity, which expresses the complexity of the sound wave propagation through the structure, was measured for each material. The theoretical sound absorption coefficients were then compared to the measured sound absorption coefficients with and without consideration of the tortuosity. A correction factor was used to bring the surface area of the granular material closer to the actual surface area and observed that the tortuosity obtained theoretical values that matched the trend of the measured values. These results indicate that using CT images to estimate the sound absorption coefficient is a viable approach. MDPI 2023-08-17 /pmc/articles/PMC10456546/ /pubmed/37629962 http://dx.doi.org/10.3390/ma16165671 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Sakamoto, Shuichi Toda, Kentaro Seino, Shotaro Hoshiyama, Kohta Satoh, Takamasa Theoretical and Experimental Analyses on the Sound Absorption Coefficient of Rice and Buckwheat Husks Based on Micro-CT Scan Data |
title | Theoretical and Experimental Analyses on the Sound Absorption Coefficient of Rice and Buckwheat Husks Based on Micro-CT Scan Data |
title_full | Theoretical and Experimental Analyses on the Sound Absorption Coefficient of Rice and Buckwheat Husks Based on Micro-CT Scan Data |
title_fullStr | Theoretical and Experimental Analyses on the Sound Absorption Coefficient of Rice and Buckwheat Husks Based on Micro-CT Scan Data |
title_full_unstemmed | Theoretical and Experimental Analyses on the Sound Absorption Coefficient of Rice and Buckwheat Husks Based on Micro-CT Scan Data |
title_short | Theoretical and Experimental Analyses on the Sound Absorption Coefficient of Rice and Buckwheat Husks Based on Micro-CT Scan Data |
title_sort | theoretical and experimental analyses on the sound absorption coefficient of rice and buckwheat husks based on micro-ct scan data |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10456546/ https://www.ncbi.nlm.nih.gov/pubmed/37629962 http://dx.doi.org/10.3390/ma16165671 |
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