Noise Control Engineering Journal最新文献

Frequency reduction and attenuation of the tire air cavity mode due to a porous lining 多孔衬里降低和衰减轮胎气穴模式的频率

IF 0.4 4区工程技术

Noise Control Engineering Journal Pub Date : 2024-01-01 DOI: 10.3397/1/37722

Kyosung Choo, Won Hong Choif”“, Guochenhao Song, J. S. Bolton

{"title":"Frequency reduction and attenuation of the tire air cavity mode due to a porous lining","authors":"Kyosung Choo, Won Hong Choif”“, Guochenhao Song, J. S. Bolton","doi":"10.3397/1/37722","DOIUrl":"https://doi.org/10.3397/1/37722","url":null,"abstract":"The tire air cavity mode is known to be a significant source of vehicle structure- borne road noise near 200 Hz for current generation passenger vehicles, and a porous lining placed on the inner surface of a tire has proven to be an effective countermeasure. The two noticeable effects\u0000 of such a lining are the reduction in the cavity resonance frequency and the attenuation of the air cavity mode. In the present work, through both theoretical and numerical analysis, the mechanisms underlying the effects of a porous lining were studied. A two-dimensional duct-shaped theoretical\u0000 model and a two-dimensional torus-shaped numerical model were created to investigate the lined tire in conjunction with the Johnson- Champoux-Allard model describing the viscous and thermal dissipative effects of the porous material. The design parameters of the porous lining were varied to\u0000 study their impact and to identify optimal ranges of the design parameters, in particular, the flow resistivity. Finally, in an experimental analysis, the sound attenuation and the frequency drop were observed in measurements of force, acceleration, and sound pressure. In conclusion, it was\u0000 demonstrated that the suggested theoretical and numerical models successfully predict the effects of porous linings and that the frequency reduction results from the decreased sound speed within the tire owing to the presence of the liner.","PeriodicalId":49748,"journal":{"name":"Noise Control Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140520686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonwoven fabric sheet with back air space serving as Helmholtz resonator 无纺布片，背面的空气空间可用作亥姆霍兹谐振器

IF 0.4 4区工程技术

Noise Control Engineering Journal Pub Date : 2024-01-01 DOI: 10.3397/1/37724

Shuichi Sakamoto, Takumi Nozawaf”“, Kodai Sato

{"title":"Nonwoven fabric sheet with back air space serving as Helmholtz resonator","authors":"Shuichi Sakamoto, Takumi Nozawaf”“, Kodai Sato","doi":"10.3397/1/37724","DOIUrl":"https://doi.org/10.3397/1/37724","url":null,"abstract":"The sound absorption effect of a Helmholtz resonator was induced by creating an aperture in a nonwoven fabric sheet with a back air space, thus obtaining a sufficient sound absorption effect in a broad frequency range. In this study, transfer matrices were used to obtain the sound absorption\u0000 coefficient. Transfer matrices were used to represent the following mathematically: a nonwoven fabric model based on the simplified limp-frame model, an acoustic element that considers the vibration of the nonwoven fabric sheet, the air space behind the nonwoven fabric sheet, and the aperture\u0000 of the nonwoven fabric sheet. Equivalent circuits combining these transfer matrices were used to obtain sound absorption coefficient. The Helmholtz resonator sound absorption effect was more pronounced for the nonwoven fabric sheets with greater ventilation resistance. The results showed consistency\u0000 between the experimental and theoretical trends. As for the sound absorption coefficient derived using the theoretical models for nonwoven fabric sheets, the results of the simplified limp-frame model were the closest to the experimental values. As the length of the back air space increased,\u0000 the peak sound absorption value shifted toward low frequencies due to the sound absorption principles of both the nonwoven fabric sheet with a back air space and the Helmholtz resonator.","PeriodicalId":49748,"journal":{"name":"Noise Control Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140516847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural vibration reduction achieved by lightweight porous layers through the near-field damping effect: A technical summary 轻质多孔层通过近场阻尼效应实现结构减震：技术摘要

IF 0.4 4区工程技术

Noise Control Engineering Journal Pub Date : 2024-01-01 DOI: 10.3397/1/37723

Yutong Xue, J. S. Boltonf”“, surname given-names

{"title":"Structural vibration reduction achieved by lightweight porous layers through the near-field damping effect: A technical summary","authors":"Yutong Xue, J. S. Boltonf”“, surname given-names","doi":"10.3397/1/37723","DOIUrl":"https://doi.org/10.3397/1/37723","url":null,"abstract":"Properly designed porous materials can provide damping equivalent to conventional viscoelastic dampers by the dissipation of the evanescent wave energy in the vibrating structure's acoustical near-field. At the same time, these materials possess advantages such as light weight and effective\u0000 sound absorption. Thus, there are potential benefits with respect to cost and weight saving in automotive and aerospace applications by using porous layers as multi-functional noise and vibration control solutions. The intention in this article is to provide a concise summary of the methods\u0000 and major findings previously presented in an extensive set of publications and conference presentations. In that work, porous media, such as fibers and foams, were designed to serve as treatments for various vibrating structures to examine their damping effectiveness. Both analytical modeling\u0000 and numerical simulation based on finite element methods were involved depending on the complexity of the structure. Specifically, a Fourier transform-based computational method was introduced as the key step to allow accurate prediction of a panel's spatial response. The analytical model\u0000 was further developed into an efficient software toolbox, so that parametric studies could be conducted to identify the optimal properties for a porous layer to provide the maximum damping within a target frequency region, based on which near-field damping design concepts are summarized. Key\u0000 findings include the observation that the addition of bulk elasticity to the solid phase of the porous medium improves damping performance compared to equivalent limp treatments.","PeriodicalId":49748,"journal":{"name":"Noise Control Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140521940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical estimation of sound absorption characteristics in a collection of rectangular holes: Comparison with experimental results 矩形孔集合吸声特性的理论估算：与实验结果的比较

IF 0.4 4区工程技术

Noise Control Engineering Journal Pub Date : 2024-01-01 DOI: 10.3397/1/37725

Shuichi Sakamoto, Gen Ikarashif”“, Kohta Hoshiyama

{"title":"Theoretical estimation of sound absorption characteristics in a collection of rectangular holes: Comparison with experimental results","authors":"Shuichi Sakamoto, Gen Ikarashif”“, Kohta Hoshiyama","doi":"10.3397/1/37725","DOIUrl":"https://doi.org/10.3397/1/37725","url":null,"abstract":"This study quantifies the sound absorption properties of small rectangular or square pores that are less than a few millimeters per side, based solely on their geometric dimensions. Analytical solutions for the sound absorption coefficient of narrow tubes with rectangular holes have\u0000 not been obtained. Therefore, alternative methods of predicting the sound absorption coefficient, such as using the circular tube approximation or the two-plane approximation, are possible. In this study, the sound absorption coefficient was estimated by several theoretical models that are\u0000 considered useful for estimating the sound absorption coefficient in rectangular tubes. The results were then compared with experimental values. For square holes, the accuracy of the sound absorption coefficient increased in the order of the model considering two-sided circumference only,\u0000 the circular tube model, and Allard's method based on Stinson's. In rectangular holes, Allard's method based on Stinson's showed good agreement with the experimental data across a wide range of aspect ratios. For rectangular holes, the accuracy of Stinson's two-plane approximation was superior\u0000 to that of the circular tube approximation when the aspect ratio was 4. Furthermore, when the aspect ratio was 8, the accuracy of Stinson's two-plane approximation became comparable to that of Allard's method based on Stinson's.","PeriodicalId":49748,"journal":{"name":"Noise Control Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140517611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of geometrical defects on the acoustical transport properties of periodic porous absorbers manufactured using stereolithography 几何缺陷对立体光刻制造的周期性多孔吸收材料声传输特性的影响

4区工程技术

Noise Control Engineering Journal Pub Date : 2023-09-01 DOI: 10.3397/1/377129

Amulya Lomte, Bhisham Sharma

{"title":"Effect of geometrical defects on the acoustical transport properties of periodic porous absorbers manufactured using stereolithography","authors":"Amulya Lomte, Bhisham Sharma","doi":"10.3397/1/377129","DOIUrl":"https://doi.org/10.3397/1/377129","url":null,"abstract":"Additive manufacturing allows the fabrication of acoustical materials with previously unrealizable micro- and macrostructural complexities. However, the still nascent understanding of various geometrical defects occurring during the additive process remains a barrier to accurately predicting the acoustical behavior of such complex absorbers. In this study, we present the results from our efforts on numerically modeling the absorption behavior of periodic porous absorbers fabricated using the stereolithography (SLA) technique using the hybrid micro-macro multiphysics approach. Specifically, we focus on understanding the role played by the expansion or shrinkage of the solid ligaments during the SLA process on the acoustical properties of the final printed samples. First, the periodic absorbers are modeled using COMSOL multiphysics, where the transport properties are derived using the micro-modeling method and sound absorption behavior using the Johnson-Champoux-Allard-Lafarge-Pride semi-empirical model. Then, results from the expansion study guide the changes in the ligament sizes in the unit cell modeling. Finally, the fabricated samples are tested using an impedance tube, and the measured absorption properties are compared to the a priori numerical predictions. Results indicate that accounting for fabrication defects within the numerical modeling schema can provide reliable sound absorption predictions for additively manufactured porous absorbers.","PeriodicalId":49748,"journal":{"name":"Noise Control Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135687197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and analysis of periodic acoustic metamaterial sound insulator using finite element method 周期声学超材料隔声体的有限元设计与分析

4区工程技术

Noise Control Engineering Journal Pub Date : 2023-09-01 DOI: 10.3397/1/377128

Zacharie Laly, Christopher Mechefske, Sebastian Ghinet, Charly T. Kone, Noureddine Atalla

{"title":"Design and analysis of periodic acoustic metamaterial sound insulator using finite element method","authors":"Zacharie Laly, Christopher Mechefske, Sebastian Ghinet, Charly T. Kone, Noureddine Atalla","doi":"10.3397/1/377128","DOIUrl":"https://doi.org/10.3397/1/377128","url":null,"abstract":"In this article, a design of acoustic metamaterial containing Helmholtz resonators periodically embedded in a porous material is investigated for aerospace applications using the finite element method (FEM). The results obtained using the FEM are compared with the results of the theory, and the proposed transfer matrix method and good agreements are obtained. The transfer matrix method was combined with FEM calculations for two different termination conditions (plane wave radiation and rigid wall) in order to retrieve the equivalent matrix of the porous layer with the integrated periodic resonator. The equivalent matrix is then coupled analytically in series with others matrices. Finite element method studies are carried out on single and double wall configurations, and the effects of different resonator parameters and the air gap on the transmission loss are illustrated. The influences of the orientation of the neck opening and the resistivity of the porous material are also studied. Finite element method results for different incident angles are presented for single and double wall configurations. The proposed design can potentially be integrated into the panels of aircraft cabins in order to reduce the noise level at low frequencies inside the cabin.","PeriodicalId":49748,"journal":{"name":"Noise Control Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135687199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deep learning-based mechanical fault detection and diagnosis of electric motors using directional characteristics of acoustic signals 基于声信号方向特征的深度学习电机机械故障检测与诊断

4区工程技术

Noise Control Engineering Journal Pub Date : 2023-09-01 DOI: 10.3397/1/377132

Srinivasa Ippili, Matthew B. Russell, Peng Wang, David W. Herrin

{"title":"Deep learning-based mechanical fault detection and diagnosis of electric motors using directional characteristics of acoustic signals","authors":"Srinivasa Ippili, Matthew B. Russell, Peng Wang, David W. Herrin","doi":"10.3397/1/377132","DOIUrl":"https://doi.org/10.3397/1/377132","url":null,"abstract":"Early identification of rotating machinery faults is crucial to avoid catastrophic fail- ures upon installation. Contact-based vibration acquisition approaches are traditionally used for the purpose of machine health monitoring and end-of-line quality control. In complex working conditions, it can be difficult to perform an accurate accelerometer based vibration test. Acoustic signals (sound pressure and particle velocity) also contain important information about the operating state of mechanical equipment and can be used to detect different faults. A deep learning approach, namely, one-dimensional convolutional neural networks (1D-CNNs) can directly process raw time signals, thereby eliminating the human dependence on fault feature extraction. An experimental research study is conducted to test the proposed 1D-CNN methodology on three different electric motor faults. The results from the study indicate that the fault detection performance from the acoustic-based measurement method is very effective and thus can be a good replacement to the conventional accelerometer-based methods for detection and diagnosis of mechanical faults in electric motors.","PeriodicalId":49748,"journal":{"name":"Noise Control Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135687295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on fast optimal reference sensor placement in active road noise control 道路噪声主动控制中参考传感器快速优化配置研究

4区工程技术

Noise Control Engineering Journal Pub Date : 2023-09-01 DOI: 10.3397/1/377126

Xiaolong Li, Chihua Lu, Wan Chen, Yawei Zhu, Can Cheng

{"title":"Research on fast optimal reference sensor placement in active road noise control","authors":"Xiaolong Li, Chihua Lu, Wan Chen, Yawei Zhu, Can Cheng","doi":"10.3397/1/377126","DOIUrl":"https://doi.org/10.3397/1/377126","url":null,"abstract":"The noise reduction performance of the active road noise control (ARNC) system highly depends on the location of the reference sensors. Generally, the optimal sensor locations are evaluated by calculating the multiple coherence function (MCF) between all possible reference signal combinations with road noise. However, this trial-and- error method becomes time-consuming when the number of candidate locations is large. The transfer path analysis method can select the optimal sensor locations quickly while with low accuracy. Therefore, this article proposes two fast optimal sensor placement (FOSP) methods, namely, Wiener filter (WF)-FOSPand the MCF-FOSP, respectively. In both methods, the sensors are iteratively extended to the desired number, and each added sensor maximizes the predicted noise reduction of this iteration loop. Numerous ARNC simulations based on measured signals are conducted to illustrate the performance of the proposed two methods in terms of efficiency and accuracy. The results demonstrate that the WF-FOSP method provides the best comprehensive performance. The data analysis for one operating condition takes three minutes, and the absolute error is within 5% with respect to the benchmark. In addition, two schemes are discussed to obtain a set of sensor locations compatible with the noise reduction requirement of different operating conditions. The sensor locations can achieve a maximum average noise reduction of 7.29 dB(A) under four operating conditions.","PeriodicalId":49748,"journal":{"name":"Noise Control Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135687191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Warmstarting strategies for convex optimization based multi-channel constrained active noise control filter design 基于凸优化的多通道约束有源噪声控制滤波器热启动策略设计

4区工程技术

Noise Control Engineering Journal Pub Date : 2023-09-01 DOI: 10.3397/1/377127

Yongjie Zhuang, Zhuang Mo, Yangfan Liu

{"title":"Warmstarting strategies for convex optimization based multi-channel constrained active noise control filter design","authors":"Yongjie Zhuang, Zhuang Mo, Yangfan Liu","doi":"10.3397/1/377127","DOIUrl":"https://doi.org/10.3397/1/377127","url":null,"abstract":"In real-world applications of active noise control (ANC) systems, various constraints are supposed to be satisfied in the controller design process. The optimal control filter coefficients can be obtained by solving a constrained optimization problem, which usually requires a significant computational effort. Recently, a convex formulation in conic form was proposed for ANC filter design. The proposed formulation was shown to result in a computational time reduction by several orders of magnitude. It is of great interest to further improve its efficiency by using a priori information of the optimal filter coefficients. One potential way of achieving this goal is to introduce a warmstart technique so that the filter solution of a similar system or environment can be referred to for selecting the starting point of the optimization algorithm. However, the conic formulation should be solved by the interior-point method, which, in general, is challenging for applying warmstart techniques. In the current work, relaxation methods are proposed to the constraints of original ANC filter design formulation so that the warmstart techniques can be applied. Then, a warmstarting technique proposed in previous study is used to solve a series of perturbed problems, and the performance of the warmstarting technique is investigated. Results show that with the proposed modifications applied, the warmstarting strategy can significantly reduce the number of iterations needed for solving the conic formulation of the ANC filter design problem without much tuning efforts, and the method is effective and robust in various environmental setups.","PeriodicalId":49748,"journal":{"name":"Noise Control Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135687194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Toward high-quality X-59 sonic thump measurements 迈向高质量的X-59音波测量

4区工程技术

Noise Control Engineering Journal Pub Date : 2023-09-01 DOI: 10.3397/1/377130

Mark C. Anderson, Kent L. Gee, J. Taggart Durrant, Alexandra Loubeau

引用次数: 1