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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...

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Autores principales: Sakamoto, Shuichi, Toda, Kentaro, Seino, Shotaro, Hoshiyama, Kohta, Satoh, Takamasa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
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.
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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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