Updated on 2026/05/26

Information

 

写真a

 
SOHEI NISHIMURA
 
Organization
Faculty of Engineering Sciences Department of Collaborative Interdisciplinary Engineering Sciences Associate Professor
Title
Associate Professor
External link

Research Areas

  • Environmental Science/Agriculture Science / Environmental load reduction and remediation

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Architectural environment and building equipment

Degree

  • 博士（工学） （ 2007.2 Kumamoto University ）

Research History

  • 九州大学 総合理工学研究院 連携融合理工学部門 准教授（クロスアポイントメント）   

    2026.4 - Present

  • カタルーニャ工科大学 客員研究員   

    2022.12 - 2023.8

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    Country：Spain

  • Kumamoto National College of Technology Department of Mechanical and Intelligent Systems Engineering Associate Professor 

    2013.4 - Present

  • Kumamoto National College of Technology Department of Mechanical and Intelligent Systems Engineering Assistant Professor 

    2009.10 - 2013.3

  • Yatsushiro National College of Technology Department of Information and Electronic Engineering Assistant Professor 

    2006.4 - 2009.9

Research Interests・Research Keywords

  • Research theme： 騒音振動

    Keyword： 騒音振動

    Research period： 2026

  • Research theme： Acoustic Engineering

    Keyword： 防音、音響理論、音響制御

    Research period： 2006.4 - Present

Awards

  • Best Paper Award (2024 Martin Hirschorn IAC Best Paper Award)

    2024.6   Institute of Noise Control Engineering of the USA   Improvement of a soundproofing vent hole

  • 令和5年度産学官連携活動報奨制度

    2023.10   独立行政法人 国立高等専門学校機構  

  • Best Paper Award (Award for the most outstanding paper)

    2015.11   The 7th International Symposium on Temporal Design   Improvement of Soundproofing Ventilation Unit

  • 連合大会講演奨励賞

    2011.3   電子情報通信学会九州支部   換気性能を有する窓の防音ユニット内の音響伝搬に関する研究

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    Country：Japan

    23

Papers

  • Enhancing ventilation holes acoustic performance through perforated absorption plate Reviewed

    Sohei Nishimura, Yuya Nishimura

    Noise Control Engineering Journal   73 ( 4 )   428 - 437   2025.11   （ ISSN:0736-2501 ）

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：Institute of Noise Control Engineering (INCE)  

    A vent hole unit, referred to as the soundproofing ventilation hole unit (SVHU), was introduced in a prior study. This unit integrates soundproofing and ventilation functions and consists of a rectangular cavity with an inlet and an outlet, designed for installation within residential walls. The sound waves propagating through the cavity include both plane wave components and higher-order wave components. The higher-order waves consist of multiple sound pressure components, and their interactions increase the overall sound pressure level. Therefore, without implementing countermeasures for higher-order waves, the noise reduction effect of the SVHU cannot be expected. To address this issue, a cavity featuring a perforated sound-absorbing plate (PSAP) was proposed, and both theoretical analysis and experimental validation were conducted. The results confirmed that the use of the perforated sound-absorbing plate significantly reduced the higher-order sound pressure components. It was confirmed through experimentation that Insertion Loss in the frequency range between 2kHz and 16kHz after insertion of PSAP is increased by 12dB.

    DOI： 10.3397/1/377345

  • Horn Use Patterns and Acoustic Characteristics in Congested Urban Traffic: A Case Study of Ho Chi Minh City Reviewed

    Thulan Nguyen, Yuya Nishimura, Sohei Nishimura

    Acoustics   7 ( 2 )   36 - 36   2025.6   （ eISSN:2624-599X ）

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    Publishing type：Research paper (scientific journal)   Publisher：MDPI AG  

    Motorcycle horns are a dominant source of urban noise in many Southeast Asian cities, driven by high two-wheeler density and limited public transport infrastructure. Although automobiles have been in use for over a century, regulations governing horn design and volume control remain inadequate. This study investigates horn use behavior in Vietnamese urban traffic, identifying distinct acoustic patterns categorized as “attention” and “warning” signals. Measurements conducted in an anechoic chamber reveal that these patterns can increase sound pressure levels by up to 17 dB compared to standard horn use, with notable differences in frequency components. These levels often exceed the daytime noise thresholds recommended by the World Health Organization (WHO), indicating potential risks for adverse health outcomes, such as elevated stress, hearing damage, sleep disturbance, and cardiovascular effects. The findings are contextualized within broader efforts to manage traffic noise in rapidly developing urban areas. Drawing parallels with studies on aircraft noise exposure in Japan, this study suggests that long-term exposure, rather than peak noise levels alone, plays a critical role in shaping community sensitivity. The study results support the need for updated noise regulations that address both the acoustic and perceptual dimensions of road traffic noise.

    DOI： 10.3390/acoustics7020036

  • Improvement of a soundproofing vent hole Reviewed

    Sohei Nishimura, Yuya Nishimura, Akifumi Tsukamoto

    Noise Control Engineering Journal   71 ( 3 )   224 - 234   2023.5   （ ISSN:0736-2501 ）

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：Institute of Noise Control Engineering (INCE)  

    In tropical climate countries, the house structure with a vent hole is widely used. The vent hole has a structure that penetrates the house's outer wall, allowing fresh air from outside to enter the room. However, external traffic noise also enters the living spaces through the vents. A novel type of soundproof vent hole unit with both soundproofing and ventilation functions was proposed in previous work. An elliptical cavity was used for this unit, but it is difficult to manufacture an elliptical cavity with a high eccentricity; also, the installation and adjustment work are expected to be difficult. A rectangular cavity with an inlet and outlet in orthogonal planes fitted to the house walls is used in this study to provide soundproofing functionality to the vent hole. First, the generation mechanism of sound pressure components propagating inside the unit was theoretically elucidated using the three-dimensional wave equation. Second, to maximize soundproofing ability, methods for reducing the number of resonances and reducing the effect of higher-order sound pressure components are described.

    DOI： 10.3397/1/377119

  • An acoustic performance of elliptical soundproof vent hole unit Reviewed

    Yuya Nishimura, Sohei Nishimura

    Applied Acoustics   182   108205 - 108205   2021.11   （ ISSN:0003-682X ）

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    Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.apacoust.2021.108205

  • Acoustic performance of an elliptical cavity on the application for soundproof ventilation units installed in dwelling walls Reviewed

    Sohei Nishimura, Yuya Nishimura, Thulan Nguyen

    Applied Acoustics   168   107418   2020.11   （ ISSN:0003-682X ）

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.apacoust.2020.107418

  • Four-Poles Parameter of an Elliptical Cavity Having the Outlet on the Body Reviewed

    Yuya Nishimura, Sohei Nishimura

    European Journal of Engineering Research and Science   5 ( 7 )   763 - 766   2020.7   （ eISSN:2506-8016 ）

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    Publishing type：Research paper (scientific journal)   Publisher：European Open Access Publishing (Europa Publishing)  

    This paper deals with the computation of the four-poles parameter of a thin elliptic cylinder in which the output is fitted to the side that is perpendicular to the input side. The four-poles parameter is based on the sound pressure calculated by solving the wave equations, with the assumption that the loss can be ignored. The four-poles parameter is widely used to estimate the noise characteristic for the acoustic system which are composed of several elements of various cross-sectional areas, various shape connected in series.

    DOI： 10.24018/ejers.2020.5.7.1998

  • Study on the Spatial Radiation Characteristic by Adjusting the Violin Sound Post Reviewed

    Yuya Nishimura, Rin Ema Minami, Sohei Nishimura

    European Journal of Engineering Research and Science   5 ( 3 )   314 - 319   2020.3   （ eISSN:2506-8016 ）

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    Publishing type：Research paper (scientific journal)   Publisher：European Open Access Publishing (Europa Publishing)  

    Violins were invented in the 16th century in Italy, many methods of manufacturing and adjusting have been developed. Certain violins are highly valued from a cultural perspective as well as for their high sound quality. However, Violin repairers have carried on techniques that have largely been transmitted verbally from generation to generation, so there is a little detailed documentation. Much research has been done to elucidate manufacturing technology and materials used for these valuable violins. This study aims to support the passing down of certain techniques from an acoustic engineering perspective. Many elements defining the timbre, but this study will be focusing on the sound post and the bridge. By clarifying the relationship of adjusting the sound post to the Spatial Radiation Characteristic, we will estimate the ideal position of the sound post and attempt to present the results in the form of a graph.

    DOI： 10.24018/ejers.2020.5.3.1821

  • Sound Propagation in a Square Duct having an Inlet and Outlet Located on the Crossed Right Angle Face Reviewed

    Sohei Nishimura, Yuya Nishimura

    International Journal of Emerging Engineering Research and Technology   6 ( 8 )   9 - 13   2018.8

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

  • Calculation Method for Predicting the Insertion-Loss of Soundproofing Ventilation Unit Reviewed

    Sohei Nishimura, Yuya Nishimura

    International Journal of Emerging Engineering Research and Technology   4 ( 8 )   32 - 37   2016.9

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    Authorship：Lead author  

  • Series of Experiments for SPVG analysis Reviewed

    Sohei Nishimura, Yuya Nishimura

    Journal of Temporal Design Arch. Environ   12(1)   52 - 58   2014.4

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    Authorship：Lead author  

  • Experimental results on the soundproofing effects of SPVG Reviewed

    Sohei Nishimura, Yuya Nishimura

    International Journal of Earth Sciences and Engineering   6 ( 4 )   688 - 691   2013.8

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    Authorship：Lead author  

  • Analysis of elliptical perforated tube muffler Reviewed

    Sohei Nishimura, Yuya Nishimura

    International Journal of Earth Sciences and Engineering   6 ( 2(1) )   130 - 134   2013.4

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    Authorship：Lead author  

  • Acoustic characteristics of the casement windows Reviewed

    Yuya Nishimura, Sohei Nishimura

    International Journal of Earth Sciences and Engineering   6 ( 4 )   743 - 745   2013   （ ISSN:0974-5904 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：CAFET INNOVA Technical Society  

    Scopus

  • Study on the air ventilation grille Reviewed

    Yuya Nishimura, Sohei Nishimura

    International Journal of Earth Sciences and Engineering   5 ( 6 )   1828 - 1832   2012   （ ISSN:0974-5904 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：CAFET INNOVA Technical Society  

    Scopus

  • Wave analysis of soundproofing air ventilation grille Reviewed

    Quang Huy Nguyen, Takashi Yano, Yusuke Takashima, Tsuyoshi Nishimura, Sohei Nishimura, Yuya Nishimura

    41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012   9   7563 - 7569   2012

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    Language：English   Publishing type：Research paper (international conference proceedings)  

    Scopus

  • Sound Propagation through the Elliptical SVU Reviewed

    Sohei Nishimura, Yuya Nishimura

    Journal of Temporal Design   11 ( 1 )   50 - 56   2011.12

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    Authorship：Lead author  

  • A computational investigation on the sound propagation in ventilation grille Reviewed

    Yuya Nishimura, Yusuke Takashima, Quang Nguyen Huy, Sohei Nishimura, Noriko Horibe, Tsuyoshi Nishimura, Takashi Yano

    40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011   2   1518 - 1521   2011

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    Language：English   Publishing type：Research paper (international conference proceedings)  

    Scopus

  • Sound propagation in soundproofing casement windows Reviewed

    Yuya Nishimura, Sohei Nishimura, Tsuyoshi Nishimura, Takashi Yano

    Applied Acoustic, Vol.70(2009)   1160 - 1167   2009.9   （ ISSN:0003-682X ）

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.apacoust.2009.04.006

    Web of Science

  • Acoustic analysis of elliptical muffler chamber having a perforated pipe Reviewed

    Sohei Nishimura, Tsuyoshi Nishimura, Takashi Yano

    Journal of Sound and Vibration   297 ( 3-5 )   761 - 773   2006.11   （ ISSN:0022-460X ）

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.jsv.2006.04.026

    Web of Science

    J-GLOBAL

  • Development of anti-noise casement windows Reviewed

    Yuya Nishimura, Tsuyoshi Nishimura, Sohei Nishimura, Takashi Yano

    Institute of Noise Control Engineering of the USA - 35th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2006   5   3215 - 3219   2006

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    Language：English   Publishing type：Research paper (international conference proceedings)  

    Scopus

  • Acoustical analysis of the noise reduction effect caused by the mufflers having perfolated pipe Reviewed

    Nishimura Sohei, Nishimura Tsuyoshi, YANO Takashi

    Acoustical Society of Japan   61 ( 10 )   576 - 584   2005   （ ISSN:0369-4232 ）

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    Authorship：Lead author   Language：Japanese   Publisher：The Acoustical Society of Japan (ASJ)  

    エンジンからの脈動気流を平滑化し、更に騒音レベルの増大の起因となる気流の速度を低減するのに有効であるため、消音器内には多孔パイプが広く用いられている。多孔パイプを使用する場合、問題となるのは消音器内部で異なる共振が発生し、それに伴い挿入損失が低下することである。本論文では、多孔パイプを消音器の空胴に装置しない場合と装着する場合についての消音器内部の共振を理論及び実験結果で示す。更に、挿入損失を改善するための尾管の設置方法について述べる。

    DOI： 10.20697/jasj.61.10_576

    CiNii Books

    Other Link： http://hdl.handle.net/2298/36364

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Presentations

  • 高次波モードを含めた消音機構の四端子定数の計算

    西村壮平

    第56回電気関係学会九州支部連合大会  2003 

  • 防音機能を有する通気口の音響特性の計算

    西村壮平, 西村勇也

    日本音響学会2024年秋季研究発表会講演論文集  2024.9 

  • 防音機能を有する通気口の音響特性に関する研究

    西村壮平, 西村勇也

    日本音響学会2014年秋季研究発表会  2014.9 

  • 楕円型防音換気ユニットの実験・解析精度向上の検討

    黒木 歩夢, 田中 裕一, 西村 壮平

    日本機械学会 九州支部 九州学生会 第56回学生員卒業研究発表講演会  2025.3 

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    Presentation type：Oral presentation (general)  

  • 有気流時の非一様孔あきパイプの効果

    西村壮平

    第55回電気関係学会九州支部連合大会  2002 

  • 有気流時の孔あきパイプの共振について

    西村壮平

    第55回電気関係学会九州支部連合大会  2002 

  • 換気用開口を有した防音ユニットの吸音プレートによる挿入損失

    西村壮平, 西村勇也

    日本音響学会2016年秋季研究発表会講演論文集  2016.9 

  • 換気性能を有する窓の防音ユニット内の音響伝搬に関する研究

    西村壮平

    平成22年度電気関係学会九州支部連合大会  2010 

  • リバースフロー型マフラーの逆流部の理論解析

    西村壮平

    第61回電気関係学会九州支部連合大会  2008 

  • Study on Theoretical Calculation of Soundproofing Air Vents

    Sohei Nishimura, Yuya Nishimura, Thulan Nguyen

    The 49th International Congress and Exhibition on Noise Control Engineering INTER-NOISE 2019  2019.6 

  • Sound Propagation Through the Elliptical Soundproofing Element

    Sohei Nishimura

    5th INTERNATIONAL SYMPOSIUM ON TEMPORAL DESIGN  2011 

  • Series of experiments for validation of analytical method for SPVG analysis

    Sohei Nishimura, Yuya Nishimura

    6th International Symposium on Temporal Design  2013.11 

  • Prediction of sound in an elliptical soundproofing element

    Sohei Nishimura

    Proceeding of Internoise2011  2011 

  • Improvement of Soundproofing Ventilation Unit

    Sohei Nishimura, Yuya Nishimura

    7th International Symposium on Temporal Design  2015.11 

  • Higher-order mode effects of the non-uniformly perforated pipe

    Sohei Nishimura

    Proceedings of the 3rd European Congress on Acoustics  2002 

  • Four pole parameters for an elliptical chamber having a perforated pipe

    Sohei Nishimura

    Proceeding of 32nd International Congress and Exposition on Noise Control Engineering  2003 

  • Flow through a non-uniformly perforated pipe

    Sohei Nishimura

    Proceeding of 32nd International Congress and Exposition on Noise Control Engineering  2003 

  • Experimental results on the soundproofing effects of SPVG

    Sohei Nishimura

    INTERNATIONAL ENGINEERING SYMPOSIUM 2013  2013.3 

  • Development of windows with sound insulation

    Sohei Nishimura

    Proceeding of 15th International Congress on Sound and Vibration  2008 

  • Analysis of elliptical perforated tube muffler

    Sohei Nishimura, Yuya Nishimura

    INTERNATIONAL ENGINEERING SYMPOSIUM 2012  2012.3 

  • An Experimental Investigation of Sound Absorbing Plate in SVU

    Sohei Nishimura, Yuya Nishimura

    45th International Congress and Exposition on Noise Control Engineering INTER-NOISE 2016  2016.8 

  • Acoustic performance of soundproof ventilation units installed in dwelling walls

    Sohei Nishimura, Yuya Nishimura, Thulan Nguyen

    23rd International Congress on Acoustics ICA 2019  2019.9 

  • Acoustic characteristic of elliptical chamber having a perforated pipe

    Sohei Nishimura

    Proceeding of 12th International Congress on Sound and Vibration  2005 

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Professional Memberships

  • 音響学会

  • 電子情報通信学会

Committee Memberships

  • 第 18 回国際工学研究集会（ISATE2025）論文査読委員  

    2025.2 - 2026.3   

Research Projects

  • 換気性能を有する環境配慮型防音窓の開発とその実用化に向けた音響的最適設計

    Grant number：26K15211  2026.4 - 2030.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    西村 壮平

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    Grant type：Scientific research funding

  • 開発途上国における居住環境向上を目的とした換気性能を有する環境配慮型防音窓の開発

    Grant number：22K12437  2022.4 - 2026.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    西村 壮平

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    Grant type：Scientific research funding

    本研究は，東南アジア諸国で深刻な社会問題となっている道路交通騒音に対して，サステナブル建築による居住環境の向上を目的とした「換気性能を有する環境配慮型防音窓の開発」を目的としている．この防音窓は，窓従来の換気性能を維持しつつ，かつ電力を使わず騒音を低減できるという点に特徴がある．本研究では上記トレードオフの関係にある防音と換気の最適化を実現するため，防音ユニット内に生じる平面波・高調波音圧成分の発生メカニズムを明らかにし，両者の共振の発生が最小となる設計を行う．また，実際の防音窓を試作し，残響室－無響室法による音響測定を実施することで実用化に向けた課題の抽出およびその対策を実施する．
    令和6年6月10日～12日に，アメリカ・ニューオリンズで開催された騒音および振動の制御に関する国際会議(NOISE-CON2024)において，昨年度国外学術誌(Noise Control Engineering Journal)に投稿し採録された論文(Improvement of a soundproofing vent hole, Noise Control Engineering Journal 71(3) May 2023, pp224-234)が最優秀論文賞(2024 Martin Hirschorn IAC Best Paper Award)を受賞した．この賞は，本論文が2022～2023年にNoise Control Engineering Journalに採録された論文の中で最も優れた研究であるとして贈られたものである．
    今年度は本論文の内容をベースに，更なる防音効果の向上を目指して研究を行った．具体的には，ユニット内に多孔パイプを用いて複室構成としたモデルを対象とし，音響理論の確立のために理論計算および実物実験と音響シミュレーションに取り組んだ．
    最終的には防音窓の試作までを目標としているが，音響理論式の確立および研究成果の発表(論文投稿)に重点を置いているため．
    研究実績の概要に示した複室構成モデルの音響理論を確立するために，理論計算および実物実験と音響シミュレーションを進めていくと共に，その研究成果を論文としてまとめる．

  • Development of Environmentally Soundproof Windows with Ventilation Performance to Reduce Noise Exposure in Dwellings

    Grant number：18K11703  2018.4 - 2023.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    NISHIMURA Sohei

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    Grant type：Scientific research funding

    The soundproofing unit that has both ventilation and soundproofing functions is the most important part of this research for the "development of environmentally soundproofing windows. In order to optimize the above trade-off relationship between soundproofing and ventilation, this research focused on the generation mechanism of resonance frequencies of plane wave and higher order sound pressure components generated inside the soundproofing unit, and established an equation that relates sound pressure according to the shape of the soundproofing unit. From the obtained equation, it is possible to calculate the structure of the unit that maximizes the sound reduction effect, as well as parameters such as dimensions, aperture position, and area.

  • Development of Mixed Reality Laboratory using Tangible User Interface

    Grant number：20300279  2008 - 2010

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    IWASAKI Yohei, ISHIMURA Sohei, KOZONO Kazutake

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    Grant type：Scientific research funding

    Mixed-Reality (MR) is placed between real environment and virtual environment. An advantage of real environment is to receive physical information. In the meantime, an advantage of virtual environment is to receive visual information. Mixed-Reality is able to include these advantages. Our group paid attention to Mixed-Reality and developed the system for electric experiment and physical experiment. This research describes development of the Mixed-Reality (MR) laboratory using ARToolKit. Result of this effort, it was able to give a prospect in the development of the MR laboratory.

  • Fracture plane control method in blasting to reduce influence on environment

    Grant number：19560815  2007 - 2009

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    NAKAMURA Yuichi, MURAYAMA Koichi, NISHIMURA Sohei

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    Grant type：Scientific research funding

    Model experiments in the laboratory and large-scale experiments in the field were carried out to develop the dynamic fracture plane control method in blasting. The method using the simple type charge holder enables us to reduce the sound noise in blasting affecting environments. Sound pressure measurements were performed to show the effectiveness of the method. The blasting agent, cracker for concrete and rock (CCR), was used to reduce loads in field works. Model experiments were also performed to develop new fracture method using the electric discharge energy