Applied Acoustics最新文献_第10页

An integrated system for real-time monitoring of temperature changes, cavitation and necrosis inside the tissue at the focus of the HIFU beam using a backscattered ultrasonic signals inducing changes in the electrical power driving the HIFU transducer 用于实时监测 HIFU 射束焦点处组织内部温度变化、空化和坏死的集成系统，该系统利用后向散射超声波信号诱导 HIFU 换能器的电功率发生变化

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2024-10-07 DOI: 10.1016/j.apacoust.2024.110325

ChengLong Hu, Qi Cao, Xin Ai, Zi Yi Chen, Yanhao Li

{"title":"An integrated system for real-time monitoring of temperature changes, cavitation and necrosis inside the tissue at the focus of the HIFU beam using a backscattered ultrasonic signals inducing changes in the electrical power driving the HIFU transducer","authors":"ChengLong Hu, Qi Cao, Xin Ai, Zi Yi Chen, Yanhao Li","doi":"10.1016/j.apacoust.2024.110325","DOIUrl":"10.1016/j.apacoust.2024.110325","url":null,"abstract":"<div><div>To address the unclear mechanism of changes in the electrical power driving the HIFU transducer and the challenges in real-time monitoring of treated tissue damage, this paper presents a system for real-time monitoring of driving electric power, focus of the HIFU beam, acoustic cavitation, temperature detection, and necrotic lesion monitoring using voltage and current sensors, cavitation-detecting probes, and temperature sensors. Utilizing the characteristics of backscattered ultrasonic signals, we investigated the mechanism and pattern of changes in the electrical power of the HIFU transducer and examined the relationship between the electrical power driving the HIFU transducer and the temperature, cavitation, and acoustic impedance of the treated tissue. Experimental results demonstrated that the system accurately monitors the output electrical power during treatment, characterizes the intensity of cavitation activity by the amplitude of driving power during sonication, and identifies necrotic lesions by changes in the amplitude of backscattered signals detected in the time interval between sonications. The system can distinguish types of transient changes in the physical properties of the treated tissue in the region of the HIFU beam focus, which is intended to increase the precision of HIFU sonication dose regulation and ensure the safety of treatment. Additionally, it provides a solution for real-time monitoring of cavitation activity and necrotic lesion severity in treated tissue during HIFU treatment.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"228 ","pages":"Article 110325"},"PeriodicalIF":3.4,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 modified active noise control algorithm for convex combined structures based on partial updating of weight matrices 基于权重矩阵部分更新的凸组合结构改进型主动噪声控制算法

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2024-10-07 DOI: 10.1016/j.apacoust.2024.110333

Jingqing Jia , Shuming Chen , Yongnan Zhao , Feng Qian

{"title":"A modified active noise control algorithm for convex combined structures based on partial updating of weight matrices","authors":"Jingqing Jia , Shuming Chen , Yongnan Zhao , Feng Qian","doi":"10.1016/j.apacoust.2024.110333","DOIUrl":"10.1016/j.apacoust.2024.110333","url":null,"abstract":"<div><div>Convex combination schemes with fast tracking ability and good steady-state restoration performance have attracted wide attention in Active Noise Control (ANC) systems. The scheme can combine the outputs of multiple filters. However, the time domain filter-X least mean square (FxLMS) algorithm used in traditional convex combination structure has the problem of high computational complexity. Compared with the conventional FxLMS algorithm, the time–frequency domain FxLMS (TF-FxLMS) algorithm can compute gradient estimates and filter reference signals in the frequency domain to reduce the computation. Since the algorithm is a block processing of the signal in the frequency domain, the presence of the fast fourier transform (FFT) introduces unwanted delays which causes the rate of convergence to slow down. FFT operations should be performed at a sampling interval, which limits the real-time implementation of the algorithm. In order to reduce the computational complexity of traditional convex combination and improve the performance of the algorithm, a convex combined structure algorithm of normalized filter-X least mean square (NFxLMS) algorithm and TF-FxLMS algorithm is proposed in this paper. In addition, in order to further reduce the amount of computation, the NFxLMS algorithm is decomposed into NFxLMS algorithm and TF-FxLMS algorithm by means of partial updating of weight matrix. In this paper, the computational complexity of the proposed algorithm is analyzed and compared with the traditional algorithm. The simulation results show that the proposed algorithm has better noise reduction effect than the traditional algorithm under the noise input conditions of various driving conditions. At the same time, it has the advantage of lower computational complexity.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"228 ","pages":"Article 110333"},"PeriodicalIF":3.4,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Analysis of performance and aerodynamic noise of centrifugal compressor using non-uniform tip clearance at near-stall condition 近失速状态下使用非均匀顶端间隙的离心式压缩机的性能和空气动力噪声分析

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2024-10-07 DOI: 10.1016/j.apacoust.2024.110296

Yipeng Cao , Shaoran Du , Xu Zhan , Yao Song , Yang Liu , Chen Liu

{"title":"Analysis of performance and aerodynamic noise of centrifugal compressor using non-uniform tip clearance at near-stall condition","authors":"Yipeng Cao , Shaoran Du , Xu Zhan , Yao Song , Yang Liu , Chen Liu","doi":"10.1016/j.apacoust.2024.110296","DOIUrl":"10.1016/j.apacoust.2024.110296","url":null,"abstract":"<div><div>As the demand for high-pressure-ratio and high-flow-rate centrifugal compressors increases, aerodynamic noise has become a key factor constraining their development. This paper investigates the effects of tip clearance on compressor performance and aerodynamic noise at near-stall conditions through numerical calculations and experiments. Firstly, the numerical model of the centrifugal compressor with original tip clearance was established. Then, the compressor’s aerodynamic performance and aerodynamic noise were calculated using the high-precision computational fluid dynamics (CFD) approach and the boundary element method (BEM), and the numerical results were validated against experimental data. Finally, the effects of non-uniform tip clearance on compressor performance and aerodynamic noise were analyzed. The results show that reducing the leading and trailing edge tip clearances improves the compressor’s aerodynamic performance compared to uniform tip clearance, and reducing the trailing edge clearance has a greater effect. Under near-stall conditions, increasing or decreasing tip clearances can somewhat reduce aerodynamic noise compared to uniform tip clearance. The aerodynamic noise is less sensitive to non-uniform tip clearance changes when tip clearance is reduced. However, when tip clearance is increased, smaller non-uniform trailing edge clearances significantly reduce aerodynamic noise.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"228 ","pages":"Article 110296"},"PeriodicalIF":3.4,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 modified noise prediction model based on vehicles’ random probability distribution for signalized and main road priority-controlled intersections 基于信号灯和主干道优先控制交叉口车辆随机概率分布的改进型噪声预测模型

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2024-10-05 DOI: 10.1016/j.apacoust.2024.110330

Xin Deng, Zhaolang Wu, Shiyu Wang, Junshan Lin, Haibo Wang

{"title":"A modified noise prediction model based on vehicles’ random probability distribution for signalized and main road priority-controlled intersections","authors":"Xin Deng, Zhaolang Wu, Shiyu Wang, Junshan Lin, Haibo Wang","doi":"10.1016/j.apacoust.2024.110330","DOIUrl":"10.1016/j.apacoust.2024.110330","url":null,"abstract":"<div><div>A modified noise prediction model based on vehicles’ random probability distribution is proposed to address the difficulty of noise prediction caused by various traffic characteristics of different types of intersections. Monte Carlo simulation is used to generate specific vehicle locations with the assumption of time headway is Burr distribution, and traffic noise can be calculated based on the energy superposition principle. The model has been validated as the average absolute error for <em>L<sub>eq</sub></em> of 1.4 dB(A) at both signalized and main road priority-controlled intersections. Applications of two types of intersections are presented. Different noise impacts are indicated in the two intersection modes, as the signalized intersection reduces noise value by 2.1 dB compared with a 0.3 dB increase at priority-controlled intersections with speeds varying from 30 to 50 km/h. Higher speeds result in more concentrated noise values across flow ratios at signalized intersections, while the opposite trend is observed at priority-controlled intersections. Flow ratios of two axes, speed, and receiver locations play different roles in the noise effect of two intersection modes.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"228 ","pages":"Article 110330"},"PeriodicalIF":3.4,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Composite delamination damage location based on non-orthogonal air-coupled ultrasonic guided waves and Artifact-Reduction damage index 基于非正交空气耦合超声导波和伪影-还原损伤指数的复合材料分层损伤定位

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2024-10-05 DOI: 10.1016/j.apacoust.2024.110326

Jing Sun, Hui Zhang, Xiaobo Rui, Zhoumo Zeng, Lixin Xu

引用次数: 0

Virtual source total focusing method for surface defects using leaky Rayleigh waves 利用泄漏瑞利波的表面缺陷虚拟源全聚焦法

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2024-10-05 DOI: 10.1016/j.apacoust.2024.110329

Zhiping Liu , Zelong Li , Duo Lyu , Zhiwu Zhang , Hongwei Hu

{"title":"Virtual source total focusing method for surface defects using leaky Rayleigh waves","authors":"Zhiping Liu , Zelong Li , Duo Lyu , Zhiwu Zhang , Hongwei Hu","doi":"10.1016/j.apacoust.2024.110329","DOIUrl":"10.1016/j.apacoust.2024.110329","url":null,"abstract":"<div><div>Leaky Rayleigh waves are sensitive to surface defects and beneficial for automated detection due to their non-contact characteristics. However, the amplitude of the leaky Rayleigh waves is low due to the attenuation of waveform conversion and acoustic waves propagation, which limits the imaging quality for long-distance detection. This study introduces a novel method combining leaky Rayleigh waves detection with virtual source total focusing method. The virtual source (VS) technology enhances the emission energy of leaky Rayleigh waves. Then, the total focusing method (TFM) is applied to acquire high-accuracy images of defects. To reduce noise and artifacts, a weighting function based on the coherence factor (CF) is developed to weight the TFM superimposed signals, thereby achieving high-quality image reconstruction. Experimental results show that compared with the conventional TFM method, the proposed method can effectively improve the amplitude of imaging signals while reducing system noise and imaging artifacts. The lateral accuracy of defects is improved, with the average lateral error of defect size being 0.178 mm. The signal-to-noise ratio (SNR) of ultrasound images is increased by 27.59 dB, and the array performance index (API) of ultrasound images is decreased by 33.78 %. The proposed method provides a new and effective approach for quantitatively assessing the surface defects of metal components using leaky Rayleigh waves.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"228 ","pages":"Article 110329"},"PeriodicalIF":3.4,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Broadband low-transmission study of ventilation metasurfaces based on Archimedean spirals 基于阿基米德螺旋的通风元面的宽带低传输研究

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2024-10-05 DOI: 10.1016/j.apacoust.2024.110335

Taoqi Lu , Zhichun Li , Yu Zhang

{"title":"Broadband low-transmission study of ventilation metasurfaces based on Archimedean spirals","authors":"Taoqi Lu , Zhichun Li , Yu Zhang","doi":"10.1016/j.apacoust.2024.110335","DOIUrl":"10.1016/j.apacoust.2024.110335","url":null,"abstract":"<div><div>The primary objectives of acoustic material design include ensuring indoor ventilation and isolating external noise. This study introduces a ventilation metamaterial surface based on Archimedean spirals (ASVM) and calculates its energy transmission coefficient using simulation and the Transfer Matrix Method (TMM). Experimental validation confirms the accuracy of the proposed model, highlighting ASVM’s potential as an effective ventilation metamaterial surface. Subsequently, ASVM is integrated with Helmholtz resonators (HR) to create two new metasurfaces: HR-ASVM without a neck and N-HR-ASVM with a neck. The former exhibits a power transmission coefficient below 0.2 across the broadband range of 1300 Hz to 2500 Hz, while the latter demonstrates superior sound insulation performance (power transmission coefficient below 0.1) from 639 Hz to 2500 Hz, with complete transmission suppression at 710 Hz. Notably, the thickness of N-HR-ASVM at this frequency is only 1/13 of the wavelength. Simulations of the acoustic pressure field and energy flow analyze the mechanisms responsible for low transmission. Finally, the energy transmission coefficient of N-HR-ASVM is experimentally measured and found to align closely with simulation results. This study provides valuable insights into the research on spiral ventilation metamaterial surfaces.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"228 ","pages":"Article 110335"},"PeriodicalIF":3.4,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Exploring associations between urban soundscape and contextual factors based on a textual data-driven analysis and mapping approach: A case study in Daejeon, Korea 基于文本数据驱动的分析和绘图方法，探索城市声景与环境因素之间的关联：韩国大田案例研究

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2024-10-04 DOI: 10.1016/j.apacoust.2024.110319

Geon-Hee Kim, Tae-Hui Kim, Joo-Young Hong

{"title":"Exploring associations between urban soundscape and contextual factors based on a textual data-driven analysis and mapping approach: A case study in Daejeon, Korea","authors":"Geon-Hee Kim, Tae-Hui Kim, Joo-Young Hong","doi":"10.1016/j.apacoust.2024.110319","DOIUrl":"10.1016/j.apacoust.2024.110319","url":null,"abstract":"<div><div>In soundscape research, it is crucial to understand how contextual factors are associated with people’s perception of acoustic environments. This study proposes a Textual Data-driven Context Analysis and Mapping Method (TD-CAMM), aiming at comprehensively exploring the intricate relationship between soundscape and contextual factors. Through a case study employing TD-CAMM, we demonstrate its effectiveness in quantitatively analyzing text-based contextual data, facilitating the identification of patterns and interrelations among diverse contextual elements via statistical analyses. Utilizing collected contextual data including the <em>purpose of visit</em>, <em>time of use</em>, <em>sound source</em>, <em>emotion</em>, and <em>perceived affective quality</em>, we conducted a hierarchical cluster analysis to characterize soundscapes of the selected locations, revealing four distinct clusters. Subsequently, association rule analysis was performed to identify unique associations among contextual elements shaping the soundscapes within each cluster. Cluster 1, the '<em>Nightlife Zone of Noisy Urban Settings</em>' was characterized by 'Restless' and 'Noisy' emotions associated with nighttime activities. Cluster 2, the '<em>Lively Human-Centered Zone for Day and Evening Activities</em>' reflected vibrant human interactions. Cluster 3, identified as '<em>Restless and Noisy Urban Traffic</em>' was marked by transportation sounds, emphasizing urban bustle. Lastly, Cluster 4, the '<em>Tranquil Urban Nature Walk</em>' encompassed serene natural spaces with 'Tranquil' emotions amidst natural sounds. These findings present a comprehensive approach to evaluating urban soundscapes, with potential applications in future urban soundscape research and design.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"228 ","pages":"Article 110319"},"PeriodicalIF":3.4,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

ISO test track influence on the EU tyre label noise value ISO 测试轨道对欧盟轮胎标签噪音值的影响

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2024-10-04 DOI: 10.1016/j.apacoust.2024.110315

Truls Berge , Piotr Mioduszewski , Maciej Hałucha , Janusz Bohatkiewicz

{"title":"ISO test track influence on the EU tyre label noise value","authors":"Truls Berge , Piotr Mioduszewski , Maciej Hałucha , Janusz Bohatkiewicz","doi":"10.1016/j.apacoust.2024.110315","DOIUrl":"10.1016/j.apacoust.2024.110315","url":null,"abstract":"<div><div>In 2009, the European Union (EU) introduced a directive governing the labelling of tyres, which underwent revision in 2020. This labelling system encompasses three key parameters related to tyre performance: wet grip (safety), rolling resistance (energy consumption), and external rolling noise (environmental impact). These label values serve as crucial information for customers seeking to purchase replacement tyres for their vehicles.</div><div>However, the accuracy and reliability of noise measurements have been a concern. Testing conducted across various ISO-standardized tracks has revealed significant inconsistencies in noise levels, with variations of 4–5 dB between tracks. Such discrepancies directly impact the labelling process, introducing uncertainty.</div><div>This paper presents results of tyre noise measurements conducted on a limited number of ISO test tracks and proposes a methodology to mitigate track-to-track variability. The study exclusively focuses on passenger car tyres. By addressing these inconsistencies, this research aims to enhance the accuracy and reliability of tyre noise labelling, thereby facilitating informed consumer decision-making and promoting environmental sustainability.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"228 ","pages":"Article 110315"},"PeriodicalIF":3.4,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Validation of an eigenvalue-based inverse method for estimating locally-reacting surface impedance 基于特征值的反演法对局部反应表面阻抗估算的验证

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2024-10-04 DOI: 10.1016/j.apacoust.2024.110332

Albert G. Prinn , Pablo Panter , Andreas Walther , Emanuël A.P. Habets

引用次数: 0