Study of arrayed side branch silencer for ventilation door (Improvement of attenuation characteristic using of the linear expanded shape side branch tube)
In this article, we examined several longitudinal-sectional sizes of a silencer whose volume was limited by the thickness and aperture ratio of the ventilation door. We report the results of improvement in the sound attenuation properties of these shapes. As an evaluation method for the silencer, we...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2017-05-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/83/850/83_16-00575/_pdf/-char/en |
| _version_ | 1811317735519420416 |
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| author | Shuichi SAKAMOTO Munehiro ISHIDA Mizuki CHINDA |
| author_facet | Shuichi SAKAMOTO Munehiro ISHIDA Mizuki CHINDA |
| author_sort | Shuichi SAKAMOTO |
| collection | DOAJ |
| description | In this article, we examined several longitudinal-sectional sizes of a silencer whose volume was limited by the thickness and aperture ratio of the ventilation door. We report the results of improvement in the sound attenuation properties of these shapes. As an evaluation method for the silencer, we measured transmission losses using an impedance measurement tube and calculated them on the basis of a theoretical analysis. The following results were obtained from the evaluation of the silencer using the measurement and calculation results and from the verification of the improved shape of a silencer and silencer array. For a side branch tube silencer with a 1/3 aperture ratio, assuming that it is installed into the ventilation door, we observed a side branch tube with an linear expanded longitudinal-sectional shape by improving the shape using the theoretical analysis of transmission losses. In addition, as a result of the experiment with a sample on the basis of the theoretical analysis, both the experimental and the theoretical analysis were in good agreement. Furthermore, the expanded shape of the longitudinal-section of the side branch tube decreased the frequency of the sound attenuation peak. It was found that a silencer with a combination of four of these silencers can be arrayed side-by-side in a ventilation door; this results in a flat transmission loss of more than 5 dB over a broad band. |
| first_indexed | 2024-04-13T12:13:32Z |
| format | Article |
| id | doaj.art-1cb521ec571d473186c408c1fcf47536 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-13T12:13:32Z |
| publishDate | 2017-05-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-1cb521ec571d473186c408c1fcf475362022-12-22T02:47:26ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612017-05-018385016-0057516-0057510.1299/transjsme.16-00575transjsmeStudy of arrayed side branch silencer for ventilation door (Improvement of attenuation characteristic using of the linear expanded shape side branch tube)Shuichi SAKAMOTO0Munehiro ISHIDA1Mizuki CHINDA2Faculty of Engineering, Niigata UniversityGraduate School of Science and Technology, Niigata UniversityGraduate School of Science and Technology, Niigata UniversityIn this article, we examined several longitudinal-sectional sizes of a silencer whose volume was limited by the thickness and aperture ratio of the ventilation door. We report the results of improvement in the sound attenuation properties of these shapes. As an evaluation method for the silencer, we measured transmission losses using an impedance measurement tube and calculated them on the basis of a theoretical analysis. The following results were obtained from the evaluation of the silencer using the measurement and calculation results and from the verification of the improved shape of a silencer and silencer array. For a side branch tube silencer with a 1/3 aperture ratio, assuming that it is installed into the ventilation door, we observed a side branch tube with an linear expanded longitudinal-sectional shape by improving the shape using the theoretical analysis of transmission losses. In addition, as a result of the experiment with a sample on the basis of the theoretical analysis, both the experimental and the theoretical analysis were in good agreement. Furthermore, the expanded shape of the longitudinal-section of the side branch tube decreased the frequency of the sound attenuation peak. It was found that a silencer with a combination of four of these silencers can be arrayed side-by-side in a ventilation door; this results in a flat transmission loss of more than 5 dB over a broad band.https://www.jstage.jst.go.jp/article/transjsme/83/850/83_16-00575/_pdf/-char/ennoise controlsound transmission lossside branch silencerventilation doorsilencer designs |
| spellingShingle | Shuichi SAKAMOTO Munehiro ISHIDA Mizuki CHINDA Study of arrayed side branch silencer for ventilation door (Improvement of attenuation characteristic using of the linear expanded shape side branch tube) Nihon Kikai Gakkai ronbunshu noise control sound transmission loss side branch silencer ventilation door silencer designs |
| title | Study of arrayed side branch silencer for ventilation door (Improvement of attenuation characteristic using of the linear expanded shape side branch tube) |
| title_full | Study of arrayed side branch silencer for ventilation door (Improvement of attenuation characteristic using of the linear expanded shape side branch tube) |
| title_fullStr | Study of arrayed side branch silencer for ventilation door (Improvement of attenuation characteristic using of the linear expanded shape side branch tube) |
| title_full_unstemmed | Study of arrayed side branch silencer for ventilation door (Improvement of attenuation characteristic using of the linear expanded shape side branch tube) |
| title_short | Study of arrayed side branch silencer for ventilation door (Improvement of attenuation characteristic using of the linear expanded shape side branch tube) |
| title_sort | study of arrayed side branch silencer for ventilation door improvement of attenuation characteristic using of the linear expanded shape side branch tube |
| topic | noise control sound transmission loss side branch silencer ventilation door silencer designs |
| url | https://www.jstage.jst.go.jp/article/transjsme/83/850/83_16-00575/_pdf/-char/en |
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