首页 > 最新文献

Acoustics Australia最新文献

英文 中文
On Caldersmith’s Measurements of Free Plates and Assembled Violins 论卡尔德史密斯对自由盘和组装小提琴的测量
IF 1.7 4区 物理与天体物理 Pub Date : 2023-05-10 DOI: 10.1007/s40857-023-00296-7
Jesús A. Torres

Experimental data were measured by Caldersmith over many years and during different stages of the construction of several violins. Unfortunately, it seems that these valuable data were never published. From the personal notes of Caldersmith that were printed (where resonant frequency, mass, thickness, instrument model, etc., are listed), a possible link between resonant frequencies of free plates and their finished instruments was investigated. However, there is no evidence to support that such a link could be strong; thus the rigidity of the rib assembly of the violins may play a more important role than generally considered.

实验数据是卡尔德史密斯多年来在几把小提琴的不同构造阶段测量的。不幸的是,这些有价值的数据似乎从未发表过。根据印刷的卡尔德史密斯的个人笔记(其中列出了共振频率,质量,厚度,仪器型号等),研究了自由板的共振频率与其成品仪器之间的可能联系。然而,没有证据支持这种联系可能很强;因此,小提琴肋骨的刚性可能比通常认为的更重要。
{"title":"On Caldersmith’s Measurements of Free Plates and Assembled Violins","authors":"Jesús A. Torres","doi":"10.1007/s40857-023-00296-7","DOIUrl":"10.1007/s40857-023-00296-7","url":null,"abstract":"<div><p>Experimental data were measured by Caldersmith over many years and during different stages of the construction of several violins. Unfortunately, it seems that these valuable data were never published. From the personal notes of Caldersmith that were printed (where resonant frequency, mass, thickness, instrument model, etc., are listed), a possible link between resonant frequencies of free plates and their finished instruments was investigated. However, there is no evidence to support that such a link could be strong; thus the rigidity of the rib assembly of the violins may play a more important role than generally considered.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"51 2","pages":"293 - 296"},"PeriodicalIF":1.7,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50018487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
News Item 新闻
IF 1.7 4区 物理与天体物理 Pub Date : 2023-05-02 DOI: 10.1007/s40857-023-00293-w
{"title":"News Item","authors":"","doi":"10.1007/s40857-023-00293-w","DOIUrl":"10.1007/s40857-023-00293-w","url":null,"abstract":"","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"51 1","pages":"1 - 21"},"PeriodicalIF":1.7,"publicationDate":"2023-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50003645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Review of Noise Pollution Policies in the Arab World 阿拉伯世界噪音污染政策综述
IF 1.7 4区 物理与天体物理 Pub Date : 2023-04-13 DOI: 10.1007/s40857-023-00294-9
Tallal Abdel Karim Bouzir, Djihed Berkouk, Dietrich Schwela, Maria Lahlouh

This paper aims to study the current legislation in the Arab world regarding noise pollution and to compare its laws, in a second step, with those of the European Union to identify the differences and similarities between these two groups of countries' policies. The methodology of this study was based mainly on analytical and comparative approaches to process the data collected from 31 legislation texts from 22 Arab countries. The data were obtained primarily from the official and governmental websites of the various ministries and state institutions concerned with environmental laws, using Arabic and second-language web searches in each country. This study shows that legislators in the investigated countries are relatively engaged in addressing environmental issues, especially noise pollution. Except for Somalia, all Arab League member countries have developed laws and regulations on noise pollution. However, there are no guidelines on noise measurement except in Oman, Qatar, and Saudi Arabia. As well, the governments of these countries still need to develop guidelines for noise mapping. Therefore, it is believed that the legislation in these countries needs to be revised and stronger. In addition, no trace of the soundscape subject has been highlighted in the Arabic legislative texts. The comparative analysis indicates that most Arab laws do not comply with the international standards established by the European Union governments. According to this study, revising and updating Arab laws is necessary, and action strategies must be implemented to achieve sustainability goals.

本文旨在研究阿拉伯世界关于噪音污染的现行立法,并将其法律与欧盟的法律进行比较,以确定这两组国家政策之间的异同。本研究的方法主要基于分析和比较方法,以处理从22个阿拉伯国家的31个立法文本中收集的数据。这些数据主要来自与环境法有关的各部委和国家机构的官方和政府网站,在每个国家使用阿拉伯语和第二语言进行网络搜索。这项研究表明,被调查国家的立法者相对致力于解决环境问题,尤其是噪音污染问题。除索马里外,所有阿拉伯联盟成员国都制定了关于噪音污染的法律法规。然而,除阿曼、卡塔尔和沙特阿拉伯外,没有噪音测量指南。同样,这些国家的政府仍然需要制定噪音测绘指南。因此,人们认为,这些国家的立法需要修订和加强。此外,阿拉伯语立法文本中没有强调声景主题的痕迹。比较分析表明,大多数阿拉伯法律不符合欧盟政府制定的国际标准。根据这项研究,修订和更新阿拉伯法律是必要的,必须实施行动战略以实现可持续性目标。
{"title":"A Review of Noise Pollution Policies in the Arab World","authors":"Tallal Abdel Karim Bouzir,&nbsp;Djihed Berkouk,&nbsp;Dietrich Schwela,&nbsp;Maria Lahlouh","doi":"10.1007/s40857-023-00294-9","DOIUrl":"10.1007/s40857-023-00294-9","url":null,"abstract":"<div><p>This paper aims to study the current legislation in the Arab world regarding noise pollution and to compare its laws, in a second step, with those of the European Union to identify the differences and similarities between these two groups of countries' policies. The methodology of this study was based mainly on analytical and comparative approaches to process the data collected from 31 legislation texts from 22 Arab countries. The data were obtained primarily from the official and governmental websites of the various ministries and state institutions concerned with environmental laws, using Arabic and second-language web searches in each country. This study shows that legislators in the investigated countries are relatively engaged in addressing environmental issues, especially noise pollution. Except for Somalia, all Arab League member countries have developed laws and regulations on noise pollution. However, there are no guidelines on noise measurement except in Oman, Qatar, and Saudi Arabia. As well, the governments of these countries still need to develop guidelines for noise mapping. Therefore, it is believed that the legislation in these countries needs to be revised and stronger. In addition, no trace of the soundscape subject has been highlighted in the Arabic legislative texts. The comparative analysis indicates that most Arab laws do not comply with the international standards established by the European Union governments. According to this study, revising and updating Arab laws is necessary, and action strategies must be implemented to achieve sustainability goals.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"51 2","pages":"183 - 200"},"PeriodicalIF":1.7,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50022557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Spectral Level Prediction Model of Ocean Ambient Noise Based on GA-LM-BP Neural Network 基于GA-LM-BP神经网络的海洋环境噪声谱级预测模型
IF 1.7 4区 物理与天体物理 Pub Date : 2023-04-02 DOI: 10.1007/s40857-023-00295-8
Ning Hu, Jiabao Zhao, Yibo Liu, Maofa Wang, Darui Liu, Youping Gong, Xin Rao

Efficient and accurate prediction of ocean ambient noise spectrum level is very important to improve the detection capability of sonar equipment. The more factors taken into account, the more complex the establishment and application of the prediction model, which makes a low prediction efficiency. As a data-driven technology, neural networks have the ability to accurately predict the state of complex systems and can avoid complex physical modeling. In this study, a neural network model is built to predict ocean ambient noise spectrum level based on the data of sea water depth, temperature, salinity, sea surface wind speed and rainfall. The model is based on Genetic Algorithm (GA), Levenberg–Marquardt algorithm (LM) and Back Propagation (BP) neural network. The use of GA and LM makes the model combine the powerful mapping ability of neural network and the global search characteristic of GA. The model is used to predict the variation characteristics of spectral levels with frequency, depth, wind speed and rainfall rate, respectively. The predicted values are compared with the real values, for example, the RMSE values are all nearly below 2.04. The results show that the GA-LM-BP neural network prediction model is accurate and effective, and has flexible input factor scalability, which provides a paradigm framework for the establishment of multi-source and multi-factor spectral level prediction model of ocean ambient noise spectrum level based on deep learning.

有效、准确地预测海洋环境噪声谱级对提高声纳设备的探测能力至关重要。考虑的因素越多,预测模型的建立和应用就越复杂,预测效率就越低。神经网络作为一种数据驱动技术,具有准确预测复杂系统状态的能力,并且可以避免复杂的物理建模。本文基于海水深度、温度、盐度、海面风速和降雨量等数据,建立了预测海洋环境噪声谱级的神经网络模型。该模型基于遗传算法(GA)、Levenberg-Marquardt算法(LM)和BP神经网络。遗传算法与LM的结合使该模型结合了神经网络强大的映射能力和遗传算法的全局搜索特性。利用该模型分别预测了谱位随频率、深度、风速和降雨率的变化特征。将预测值与实际值进行比较,RMSE值均接近于2.04以下。结果表明,GA-LM-BP神经网络预测模型准确有效,且具有灵活的输入因子可扩展性,为建立基于深度学习的多源多因子海洋环境噪声谱级预测模型提供了一个范式框架。
{"title":"Spectral Level Prediction Model of Ocean Ambient Noise Based on GA-LM-BP Neural Network","authors":"Ning Hu,&nbsp;Jiabao Zhao,&nbsp;Yibo Liu,&nbsp;Maofa Wang,&nbsp;Darui Liu,&nbsp;Youping Gong,&nbsp;Xin Rao","doi":"10.1007/s40857-023-00295-8","DOIUrl":"10.1007/s40857-023-00295-8","url":null,"abstract":"<div><p>Efficient and accurate prediction of ocean ambient noise spectrum level is very important to improve the detection capability of sonar equipment. The more factors taken into account, the more complex the establishment and application of the prediction model, which makes a low prediction efficiency. As a data-driven technology, neural networks have the ability to accurately predict the state of complex systems and can avoid complex physical modeling. In this study, a neural network model is built to predict ocean ambient noise spectrum level based on the data of sea water depth, temperature, salinity, sea surface wind speed and rainfall. The model is based on Genetic Algorithm (GA), Levenberg–Marquardt algorithm (LM) and Back Propagation (BP) neural network. The use of GA and LM makes the model combine the powerful mapping ability of neural network and the global search characteristic of GA. The model is used to predict the variation characteristics of spectral levels with frequency, depth, wind speed and rainfall rate, respectively. The predicted values are compared with the real values, for example, the RMSE values are all nearly below 2.04. The results show that the GA-LM-BP neural network prediction model is accurate and effective, and has flexible input factor scalability, which provides a paradigm framework for the establishment of multi-source and multi-factor spectral level prediction model of ocean ambient noise spectrum level based on deep learning.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"51 2","pages":"265 - 278"},"PeriodicalIF":1.7,"publicationDate":"2023-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50001641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Numerical and Experimental Investigations of Multiple Resonators on Reducing Tyre Cavity Resonance Noise 多腔器降低轮胎空腔共振噪声的数值与实验研究
IF 1.7 4区 物理与天体物理 Pub Date : 2023-03-24 DOI: 10.1007/s40857-023-00292-x
Yue Bao, Xiandong Liu, Zongnan Wang, Yingchun Shan, Tian He

Tyre cavity resonance noise is one kind of low-frequency and narrow-band noise that particularly affects the passengers inside the cabin of vehicle, especially when driving at a medium speed. In this paper, a noise reduction structure made of multiple resonators is proposed to reduce this type of noise. Based on the local resonance principle, the dimension of the resonator unit is determined by the tyre cavity resonance frequency. In order to obtain this characteristic frequency and the acoustic feature, the acoustic-structure coupling model of the tyre and cavity is established by the finite element method (FEM), and the modal frequency and shape of the tyre cavity are calculated and validated by the experimental results. Based on these analyses, the geometric and material parameters of the sound reduction structure are calculated to match the resonant frequency of the tyre cavity. A long belt filled with multiple resonators is designed to fit the profile of the tyre cavity, and simulations and experimental tests are conducted to investigate the noise reduction performance. The results show that the multiple resonators can significantly reduce the sound pressure inside the tyre cavity due to the vibroacoustic coupling effect. This paper provides a novel solution for reducing tyre cavity resonance noise.

胎腔共振噪声是一种低频窄带噪声,特别是在中速行驶时,会对车内乘客产生影响。本文提出了一种由多个谐振器组成的降噪结构来降低这种类型的噪声。基于局部谐振原理,谐振单元的尺寸由轮胎腔谐振频率决定。为了获得该特征频率和声学特征,采用有限元法建立了轮胎与胎腔的声-结构耦合模型,并计算了胎腔的模态频率和形状,并通过实验结果进行了验证。基于这些分析,计算了降噪结构的几何参数和材料参数,以匹配轮胎空腔的谐振频率。设计了一个装有多个谐振器的长带,以适应轮胎空腔的轮廓,并进行了模拟和实验测试,以研究其降噪性能。结果表明,由于振声耦合效应,多个谐振器可以显著降低轮胎腔内的声压。本文为降低轮胎胎腔共振噪声提供了一种新的解决方案。
{"title":"Numerical and Experimental Investigations of Multiple Resonators on Reducing Tyre Cavity Resonance Noise","authors":"Yue Bao,&nbsp;Xiandong Liu,&nbsp;Zongnan Wang,&nbsp;Yingchun Shan,&nbsp;Tian He","doi":"10.1007/s40857-023-00292-x","DOIUrl":"10.1007/s40857-023-00292-x","url":null,"abstract":"<div><p>Tyre cavity resonance noise is one kind of low-frequency and narrow-band noise that particularly affects the passengers inside the cabin of vehicle, especially when driving at a medium speed. In this paper, a noise reduction structure made of multiple resonators is proposed to reduce this type of noise. Based on the local resonance principle, the dimension of the resonator unit is determined by the tyre cavity resonance frequency. In order to obtain this characteristic frequency and the acoustic feature, the acoustic-structure coupling model of the tyre and cavity is established by the finite element method (FEM), and the modal frequency and shape of the tyre cavity are calculated and validated by the experimental results. Based on these analyses, the geometric and material parameters of the sound reduction structure are calculated to match the resonant frequency of the tyre cavity. A long belt filled with multiple resonators is designed to fit the profile of the tyre cavity, and simulations and experimental tests are conducted to investigate the noise reduction performance. The results show that the multiple resonators can significantly reduce the sound pressure inside the tyre cavity due to the vibroacoustic coupling effect. This paper provides a novel solution for reducing tyre cavity resonance noise.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"51 2","pages":"255 - 264"},"PeriodicalIF":1.7,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50045748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The Effect of Classroom Acoustic Treatment on Listening, Learning, and Well-being: A Scoping Review 课堂声学处理对听力、学习和幸福感的影响:范围回顾
IF 1.7 4区 物理与天体物理 Pub Date : 2023-03-24 DOI: 10.1007/s40857-023-00291-y
Kiri Mealings

Classrooms are important learning spaces, however, the acoustic conditions in these spaces can often be suboptimal. The aim of this scoping review, which used the PRISMA-ScR protocol, was to understand what is known from the literature about the effect of classroom acoustic treatment on students’ listening, learning, and well-being. Thirteen papers from the database searches were deemed relevant for the review. Information on the years of publication of the papers, the population studied, the types of acoustic treatment used, the measures and methods used to assess the effect of acoustic treatment, and the outcomes of the papers was gathered. Seven of the 13 studies reported positive effects of classroom acoustic treatment on student’s speech perception, attention, and well-being. Five studies reported both positive effects and no effect depending on the measure, condition, or population. The remaining study reported a negative effect of classroom acoustic treatment on children’s speech perception and listening effort. These findings suggest that the effect of ceiling and/or wall absorbers/diffusers on sound and reverberation in the room can help students’ speech perception, attention, reading, and well-being, but they may also reduce the speech transmission index resulting in increased listening effort. The limitations of the reviewed studies and avenues for future research on the effect of acoustic treatment on a broader range of listening, learning, and well-being outcomes for students are discussed.

教室是重要的学习空间,然而,这些空间的声学条件往往不理想。这项范围界定审查使用了PRISMA ScR协议,目的是了解文献中关于课堂声学治疗对学生听力、学习和幸福感的影响。数据库检索中的13篇论文被认为与审查有关。收集了有关论文发表年份、研究人群、使用的声学治疗类型、用于评估声学治疗效果的措施和方法以及论文结果的信息。13项研究中有7项报告了课堂声学治疗对学生的言语感知、注意力和幸福感的积极影响。五项研究报告了积极影响和无效影响,具体取决于措施、条件或人群。剩下的研究报告了课堂声学处理对儿童言语感知和听力的负面影响。这些发现表明,天花板和/或墙壁吸收器/扩散器对房间内声音和混响的影响可以帮助学生的言语感知、注意力、阅读和幸福感,但也可能降低言语传递指数,从而增加听力。讨论了所回顾的研究的局限性以及未来研究声学治疗对学生更广泛的听力、学习和幸福感结果的影响的途径。
{"title":"The Effect of Classroom Acoustic Treatment on Listening, Learning, and Well-being: A Scoping Review","authors":"Kiri Mealings","doi":"10.1007/s40857-023-00291-y","DOIUrl":"10.1007/s40857-023-00291-y","url":null,"abstract":"<div><p>Classrooms are important learning spaces, however, the acoustic conditions in these spaces can often be suboptimal. The aim of this scoping review, which used the PRISMA-ScR protocol, was to understand what is known from the literature about the effect of classroom acoustic treatment on students’ listening, learning, and well-being. Thirteen papers from the database searches were deemed relevant for the review. Information on the years of publication of the papers, the population studied, the types of acoustic treatment used, the measures and methods used to assess the effect of acoustic treatment, and the outcomes of the papers was gathered. Seven of the 13 studies reported positive effects of classroom acoustic treatment on student’s speech perception, attention, and well-being. Five studies reported both positive effects and no effect depending on the measure, condition, or population. The remaining study reported a negative effect of classroom acoustic treatment on children’s speech perception and listening effort. These findings suggest that the effect of ceiling and/or wall absorbers/diffusers on sound and reverberation in the room can help students’ speech perception, attention, reading, and well-being, but they may also reduce the speech transmission index resulting in increased listening effort. The limitations of the reviewed studies and avenues for future research on the effect of acoustic treatment on a broader range of listening, learning, and well-being outcomes for students are discussed.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"51 2","pages":"279 - 291"},"PeriodicalIF":1.7,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40857-023-00291-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50046092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A Modified Reference Signal Selection Method for Feed-Forward Active Road Noise Control System 一种改进的前馈主动道路噪声控制系统参考信号选择方法
IF 1.7 4区 物理与天体物理 Pub Date : 2023-03-14 DOI: 10.1007/s40857-023-00290-z
Zhengdao Zhou, Shuming Chen, Yaoyu Cai, Zhang Zhang

Active control of road noise has been widely recognized as a promising technology. For a feed-forward active road noise control system, the proper selection of the reference vibration signals is very important. It determines the theoretically optimal effect that the system can achieve. In order to achieve a reasonable selection of reference signals, a modified signal selection method is proposed in this paper. A test on road noise data acquisition and relevant analysis is conducted to decide the target frequency band for noise control. After that, an initial reference signal set is established and it is expanded by iteratively calculating the Fisher information matrix and the amount of new correlation information so that a reference signal set that has optimal multiple coherence with road noise is obtained. In the case study, a comparison between the traditional method and the proposed method is conducted. The results show that the proposed method can reach a higher average coherence coefficient and better noise reduction performance than the traditional method.

道路噪声的主动控制已被广泛认为是一项有前途的技术。对于前馈道路噪声主动控制系统,参考振动信号的合理选择至关重要。确定了系统所能达到的理论最优效果。为了实现对参考信号的合理选择,本文提出了一种改进的信号选择方法。通过道路噪声数据采集试验和相关分析,确定了噪声控制的目标频段。然后,建立初始参考信号集,并通过迭代计算Fisher信息矩阵和新增相关信息量对其进行扩展,得到与道路噪声具有最优多重相干性的参考信号集。在实例研究中,对传统方法和本文提出的方法进行了比较。结果表明,与传统方法相比,该方法具有更高的平均相干系数和更好的降噪性能。
{"title":"A Modified Reference Signal Selection Method for Feed-Forward Active Road Noise Control System","authors":"Zhengdao Zhou,&nbsp;Shuming Chen,&nbsp;Yaoyu Cai,&nbsp;Zhang Zhang","doi":"10.1007/s40857-023-00290-z","DOIUrl":"10.1007/s40857-023-00290-z","url":null,"abstract":"<div><p>Active control of road noise has been widely recognized as a promising technology. For a feed-forward active road noise control system, the proper selection of the reference vibration signals is very important. It determines the theoretically optimal effect that the system can achieve. In order to achieve a reasonable selection of reference signals, a modified signal selection method is proposed in this paper. A test on road noise data acquisition and relevant analysis is conducted to decide the target frequency band for noise control. After that, an initial reference signal set is established and it is expanded by iteratively calculating the Fisher information matrix and the amount of new correlation information so that a reference signal set that has optimal multiple coherence with road noise is obtained. In the case study, a comparison between the traditional method and the proposed method is conducted. The results show that the proposed method can reach a higher average coherence coefficient and better noise reduction performance than the traditional method.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"51 2","pages":"243 - 253"},"PeriodicalIF":1.7,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50026346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Study on the Performance Improvement Mechanisms of Expansion Chamber Water Mufflers with Reacting End Walls 带反应端壁膨胀室水消声器性能改进机理研究
IF 1.7 4区 物理与天体物理 Pub Date : 2023-03-09 DOI: 10.1007/s40857-023-00288-7
Yao Sun, Zhihao Wang, hengliang Wu, Chaoqun Yan

This paper investigated the effect of wall compliance on the noise attenuation performance of a water muffler. Firstly, the sound transmission loss (TL) of an expansion chamber with a piston-spring element located at one end wall of the chamber was derived using the transfer matrix method. It is found that transmission loss of a water-filled expansion chamber can be noticeably improved by introducing a reacting element, especially for the low-frequency range and frequency range around the resonance of the reacting element. A further lumped model established using acoustical–electrical analogy reveals that the reacting element functions as a volume amplifier of the expansion chamber for the low-frequency range, while the resonant behavior is dominated by the area and impedance of the reacting element. Then, the model was extended by replacing the piston-spring element with a circular plate. A 1.5-dimensional model was developed in which the fluid–structure interaction was regarded as an added mass effect, and a FEM model was used to verify the accuracy of the theoretical model. Finally, the effects of material properties, thickness, radius, boundary conditions, surface area, and length of the expansion chamber on the sound attenuation performance of reacting expansion chamber mufflers have been examined and discussed.

本文研究了墙体顺应性对消声器噪声衰减性能的影响。首先,利用传递矩阵法推导了一端壁上装有活塞弹簧元件的膨胀腔的传声损失;研究发现,在充水膨胀室中引入反应元件可以明显改善其传输损失,特别是在反应元件共振的低频范围和周围频率范围内。利用声学-电类比建立的集总模型表明,反应元件在低频范围内充当膨胀室的体积放大器,而谐振行为受反应元件的面积和阻抗的支配。然后用圆板代替活塞弹簧单元对模型进行扩展。建立了将流固耦合作为附加质量效应的1.5维模型,并用有限元模型验证了理论模型的准确性。最后,对材料性能、膨胀室的厚度、半径、边界条件、比表面积和长度等因素对反应膨胀室消声器消声性能的影响进行了分析和讨论。
{"title":"Study on the Performance Improvement Mechanisms of Expansion Chamber Water Mufflers with Reacting End Walls","authors":"Yao Sun,&nbsp;Zhihao Wang,&nbsp;hengliang Wu,&nbsp;Chaoqun Yan","doi":"10.1007/s40857-023-00288-7","DOIUrl":"10.1007/s40857-023-00288-7","url":null,"abstract":"<div><p>This paper investigated the effect of wall compliance on the noise attenuation performance of a water muffler. Firstly, the sound transmission loss (TL) of an expansion chamber with a piston-spring element located at one end wall of the chamber was derived using the transfer matrix method. It is found that transmission loss of a water-filled expansion chamber can be noticeably improved by introducing a reacting element, especially for the low-frequency range and frequency range around the resonance of the reacting element. A further lumped model established using acoustical–electrical analogy reveals that the reacting element functions as a volume amplifier of the expansion chamber for the low-frequency range, while the resonant behavior is dominated by the area and impedance of the reacting element. Then, the model was extended by replacing the piston-spring element with a circular plate. A 1.5-dimensional model was developed in which the fluid–structure interaction was regarded as an added mass effect, and a FEM model was used to verify the accuracy of the theoretical model. Finally, the effects of material properties, thickness, radius, boundary conditions, surface area, and length of the expansion chamber on the sound attenuation performance of reacting expansion chamber mufflers have been examined and discussed.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"51 2","pages":"221 - 231"},"PeriodicalIF":1.7,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50017028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical Evaluation of the Human Skull with Focused Ultrasound Stimulation 聚焦超声刺激对人颅骨的数值评价
IF 1.7 4区 物理与天体物理 Pub Date : 2023-02-25 DOI: 10.1007/s40857-023-00289-6
Yi Huang, Peng Wen, Bo Song, Yan Li

Transcranial focused ultrasound stimulation is a promising brain stimulation technique for its noninvasiveness and higher spatial resolutions and is used for various neuromodulation applications. As the skull is the primary barrier to delivering ultrasound to the deep brain region, it induces unpredictable ultrasound exposure. The objective of the study is to design customised transducers and assess the effects of the skull on ultrasound wave propagation. Computational skull models were constructed using computerised tomography scans. A full-wave finite-difference time-domain simulation platform, Sim4Life, was then used to design and simulate ultrasound wave propagation. In addition, the impacts of the skull were assessed through sensitivity analysis in the intracranial intensity, pressure, full width at half maximum, and energy deposition. Compared to the intracranial intensity distribution when the transducer is placed over the top area of the skull, the peak intensity increased by 23.4% for transmission through the temporal window. The temporal window, the thinnest part of the skull, provides a site for intracranial peak intensity and optimal focal spot area using focused ultrasound. The numerical investigation in this study provided a guideline for targeting and dosing, accounting for and lessening variability in studies addressing transcranial focused ultrasound applications.

经颅聚焦超声刺激是一种很有前途的脑刺激技术,具有无创性和较高的空间分辨率,可用于各种神经调控应用。由于头骨是将超声波输送到大脑深处的主要屏障,它会导致不可预测的超声波暴露。该研究的目的是设计定制的换能器,并评估头骨对超声波传播的影响。使用计算机断层扫描构建了计算颅骨模型。然后使用全波时域有限差分模拟平台Sim4Life来设计和模拟超声波的传播。此外,通过对颅内强度、压力、半最大全宽和能量沉积的敏感性分析,评估了颅骨的影响。与将换能器放置在颅骨顶部区域时的颅内强度分布相比,通过颞窗传输的峰值强度增加了23.4%。颞窗是颅骨最薄的部分,使用聚焦超声为颅内峰值强度和最佳焦斑面积提供了一个位置。本研究中的数值研究为靶向和给药提供了指导,说明并减少了经颅聚焦超声应用研究的可变性。
{"title":"Numerical Evaluation of the Human Skull with Focused Ultrasound Stimulation","authors":"Yi Huang,&nbsp;Peng Wen,&nbsp;Bo Song,&nbsp;Yan Li","doi":"10.1007/s40857-023-00289-6","DOIUrl":"10.1007/s40857-023-00289-6","url":null,"abstract":"<div><p>Transcranial focused ultrasound stimulation is a promising brain stimulation technique for its noninvasiveness and higher spatial resolutions and is used for various neuromodulation applications. As the skull is the primary barrier to delivering ultrasound to the deep brain region, it induces unpredictable ultrasound exposure. The objective of the study is to design customised transducers and assess the effects of the skull on ultrasound wave propagation. Computational skull models were constructed using computerised tomography scans. A full-wave finite-difference time-domain simulation platform, Sim4Life, was then used to design and simulate ultrasound wave propagation. In addition, the impacts of the skull were assessed through sensitivity analysis in the intracranial intensity, pressure, full width at half maximum, and energy deposition. Compared to the intracranial intensity distribution when the transducer is placed over the top area of the skull, the peak intensity increased by 23.4% for transmission through the temporal window. The temporal window, the thinnest part of the skull, provides a site for intracranial peak intensity and optimal focal spot area using focused ultrasound. The numerical investigation in this study provided a guideline for targeting and dosing, accounting for and lessening variability in studies addressing transcranial focused ultrasound applications.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"51 2","pages":"233 - 241"},"PeriodicalIF":1.7,"publicationDate":"2023-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50046910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Robust Matched Field Processing Using an Empirical Characteristic Function Approach Under Impulsive Noise Environments 脉冲噪声环境下经验特征函数鲁棒匹配场处理
IF 1.7 4区 物理与天体物理 Pub Date : 2023-02-25 DOI: 10.1007/s40857-023-00287-8
Mohsen Asghari, Mohammad Zareinejad, Seyed Mehdi Rezaei, Hamidreza Amindavar

Matched Field Processing (MFP) is an inversion technique often employed in source localization applications. Conventional MFP approaches are incapable of producing precise results in the presence of extremely impulsive noises, which are typically present in actual applications such as underwater acoustics. This is because the covariance matrix for this category of noises does not converge. Moreover, impulsive noise suppression algorithms fail to provide accurate results. Particularly, fractional lower order moment (FLOM)-based approaches have an unbounded output, and data trimming methods introduce uncertainty into the estimation covariance matrix. In this study, a novel MFP method employing the empirical characteristic function (ECF) is developed. The desirable properties of the characteristic function (CF) result in a robust localization method that is ideally suited for extremely strong tailed noise environments. Using the CF array output, a new covariance-like matrix that can be used in MFP methods has been constructed. To demonstrate the efficiency of the ECF-MFP technique, experiments are conducted in a water tank. Experimental results reveal that this method is very robust in the presence of very heavy tailed noise, a low signal-to-noise ratio, and a tiny sample size. Additionally, it outperforms previous approaches in terms of resolution probability.

匹配场处理(MFP)是源定位应用中经常使用的反演技术。传统的MFP方法在存在极端脉冲噪声的情况下无法产生精确的结果,这些噪声通常存在于诸如水下声学的实际应用中。这是因为这类噪声的协方差矩阵不收敛。此外,脉冲噪声抑制算法不能提供准确的结果。特别地,基于分数低阶矩(FLOM)的方法具有无界输出,并且数据修剪方法将不确定性引入估计协方差矩阵。在这项研究中,提出了一种新的MFP方法,采用经验特征函数(ECF)。特征函数(CF)的理想特性导致了一种鲁棒的定位方法,该方法非常适合于极强尾噪声环境。利用CF阵列的输出,构造了一个可用于MFP方法的新的类协方差矩阵。为了证明ECF-MFP技术的有效性,在水箱中进行了实验。实验结果表明,该方法在存在非常重的尾噪声、低信噪比和小样本量的情况下是非常稳健的。此外,它在分辨率概率方面优于以前的方法。
{"title":"Robust Matched Field Processing Using an Empirical Characteristic Function Approach Under Impulsive Noise Environments","authors":"Mohsen Asghari,&nbsp;Mohammad Zareinejad,&nbsp;Seyed Mehdi Rezaei,&nbsp;Hamidreza Amindavar","doi":"10.1007/s40857-023-00287-8","DOIUrl":"10.1007/s40857-023-00287-8","url":null,"abstract":"<div><p>Matched Field Processing (MFP) is an inversion technique often employed in source localization applications. Conventional MFP approaches are incapable of producing precise results in the presence of extremely impulsive noises, which are typically present in actual applications such as underwater acoustics. This is because the covariance matrix for this category of noises does not converge. Moreover, impulsive noise suppression algorithms fail to provide accurate results. Particularly, fractional lower order moment (FLOM)-based approaches have an unbounded output, and data trimming methods introduce uncertainty into the estimation covariance matrix. In this study, a novel MFP method employing the empirical characteristic function (ECF) is developed. The desirable properties of the characteristic function (CF) result in a robust localization method that is ideally suited for extremely strong tailed noise environments. Using the CF array output, a new covariance-like matrix that can be used in MFP methods has been constructed. To demonstrate the efficiency of the ECF-MFP technique, experiments are conducted in a water tank. Experimental results reveal that this method is very robust in the presence of very heavy tailed noise, a low signal-to-noise ratio, and a tiny sample size. Additionally, it outperforms previous approaches in terms of resolution probability.\u0000</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"51 2","pages":"201 - 219"},"PeriodicalIF":1.7,"publicationDate":"2023-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50046911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
期刊
Acoustics Australia
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1