Applied Acoustics最新文献_第3页

Influence of transducer locations on acoustic impedance prediction in porous systems with application to vegetated roofs 传感器位置对多孔系统声阻抗预测的影响及其在植被屋顶上的应用

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2026-03-15 Epub Date: 2026-01-10 DOI: 10.1016/j.apacoust.2025.111213

Chang Liu , Fotis Georgiou , Maarten Hornikx

{"title":"Influence of transducer locations on acoustic impedance prediction in porous systems with application to vegetated roofs","authors":"Chang Liu , Fotis Georgiou , Maarten Hornikx","doi":"10.1016/j.apacoust.2025.111213","DOIUrl":"10.1016/j.apacoust.2025.111213","url":null,"abstract":"<div><div>Urban vegetation, such as vegetated roofs, is effective in mitigating urban noise. In previous research, the acoustic impedance of vegetated roofs could be predicted by minimising the differences between the measured and pre-calculated level differences between two vertically placed microphones using the multiple-geometry technique. However, it was found that for some cases, the predicted sound pressure level differences deviated from the measured ones at the interference peaks. The sound pressure level produced by a single sound source above a ground surface is characterized by the interference of the direct and ground reflected sound waves, and the accuracy of the assumed locations of the transducers influences the prediction of the ground surface impedance. Therefore, the sensitivity of the transducers’ locations on the determination of the acoustic impedance of porous materials using the multiple-geometry technique was assessed in this research. It was found that small errors on the transducers’ locations lead to significant variations in predicted impedance and material properties. The tolerance of the extracted transducers’ locations is recommended to be within ± 0.005 m to achieve an accurate and unique prediction of the surface impedance of porous materials.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111213"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145941255","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

Unsupervised seabed habitat change detection with multibeam backscatter data using a constrained Gaussian mixture model 基于约束高斯混合模型的多波束后向散射数据无监督海底生境变化检测

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2026-03-15 Epub Date: 2026-01-07 DOI: 10.1016/j.apacoust.2026.111222

Qian Bai , Alireza Amiri-Simkooei , Sebastiaan Mestdagh , Dick G. Simons , Mirjam Snellen

{"title":"Unsupervised seabed habitat change detection with multibeam backscatter data using a constrained Gaussian mixture model","authors":"Qian Bai , Alireza Amiri-Simkooei , Sebastiaan Mestdagh , Dick G. Simons , Mirjam Snellen","doi":"10.1016/j.apacoust.2026.111222","DOIUrl":"10.1016/j.apacoust.2026.111222","url":null,"abstract":"<div><div>Seabed backscatter data acquired by the multibeam echosounder (MBES) have been identified as a valuable indicator of sediment properties and benthic community characteristics. However, developing robust change detection models with MBES backscatter remains challenging due to the high costs and limited spatial coverage of seabed ground truth data. Lack of absolute backscatter calibration also hinders the comparison between repeated MBES measurements. To mitigate these issues, we propose an unsupervised method to detect seabed changes by fitting a Gaussian Mixture Model to the backscatter difference between two datasets. A relative calibration is conducted based on a stable reference area to eliminate the impact of possible drifts in echosounder characteristics on the backscatter difference. We then model the unchanged class as a zero-mean Gaussian distribution, with its variance constrained by the backscatter uncertainty estimated from the reference area. By processing each incident angle individually, the angular range with the greatest ability for seabed change detection can also be investigated. We demonstrate the effectiveness of the proposed method through two case studies in the Dutch North Sea. The detected changes reveal seasonal and temporal variations in benthic communities, such as sand mason worms, and are consistent with the sediment movement in one of the study areas. This research highlights the value of MBES backscatter data for seabed change detection and provides a cost-effective solution for seabed habitat monitoring with acoustic measurements.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111222"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145904218","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

Implementation of broadband acoustic impedance for locally and non-locally reacting perforated plate liners in a time-domain boundary element method 用时域边界元方法实现局部和非局部反应穿孔板衬垫的宽带声阻抗

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2026-03-15 Epub Date: 2026-01-28 DOI: 10.1016/j.apacoust.2026.111238

Yilei Fu , Qixiang Zhang , Zhiliang Hong , Guangyu Zhang , Xiaoyu Wang

引用次数: 0

Multi-bandgap metamaterial-based suppression of nonlinear multi-harmonic signals in ultrasonic guided wave 基于多禁带的超材料对超声导波非线性多谐波信号的抑制

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2026-03-15 Epub Date: 2026-01-27 DOI: 10.1016/j.apacoust.2026.111248

Weiguo Chen, Xiaobin Hong, Dingmin Yang, Jiangbo Chen, Zhi Li

{"title":"Multi-bandgap metamaterial-based suppression of nonlinear multi-harmonic signals in ultrasonic guided wave","authors":"Weiguo Chen, Xiaobin Hong, Dingmin Yang, Jiangbo Chen, Zhi Li","doi":"10.1016/j.apacoust.2026.111248","DOIUrl":"10.1016/j.apacoust.2026.111248","url":null,"abstract":"<div><div>Ultrasonic guided wave is susceptible to nonlinear effects in the instrument measurement chain during damage detection, generating multi-harmonic interference signals that affect the accuracy of damage signature identification. To address this issue, a multi-bandgap metamaterial structure design method is proposed, which utilizes multiple bandgaps to suppress multi-harmonic interference signals. First, a genetic algorithm fitness function is designed to optimize six metamaterial configurations, successfully obtaining a stepped square pillarlike metamaterial with dual bandgaps of 120 kHz (2nd harmonic) and 180 kHz (3rd harmonic). Simulation and experimental results demonstrate that the designed metamaterial allows the 60 kHz fundamental frequency to pass with slight attenuation, while achieving a strong suppression effect on the 2nd and 3rd harmonic components. Finally, in ultrasonic guided wave testing experiments on specimens containing fatigue microcrack with a width of 5–10 μm, the multi-bandgap metamaterial effectively suppressed the instrument’s inherent harmonic noise, highlighting the nonlinear harmonics induced by the microcrack, providing a reliable basis for early microcrack identification. This study demonstrates the significant advantages of multi-bandgap metamaterial in multi-frequency wave control, frequency selectivity and microdamage detection, highlighting the important potential of metamaterial in the field of structural health monitoring.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111248"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079033","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

Multi-band controllable acoustic topological insulator based on stacked composite resonant cavities 基于堆叠复合谐振腔的多波段可控声学拓扑绝缘体

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2026-03-15 Epub Date: 2026-01-12 DOI: 10.1016/j.apacoust.2026.111233

Xiao Liang , Zijing Yang , Jiangxia Luo , Nansha Gao , Guojian Zhou

{"title":"Multi-band controllable acoustic topological insulator based on stacked composite resonant cavities","authors":"Xiao Liang , Zijing Yang , Jiangxia Luo , Nansha Gao , Guojian Zhou","doi":"10.1016/j.apacoust.2026.111233","DOIUrl":"10.1016/j.apacoust.2026.111233","url":null,"abstract":"<div><div>The development of multi-band, wide-frequency, spectrum-tunable topological acoustic transmission is essential for the practical application of topological acoustic insulators. However, conventional approaches rely on complex structural reconfiguration or parameter modulation, which severely limits their flexibility. This paper addresses this issue by proposing a universal method of optimising multi-band structures based on stacked composite resonators. The key advantage of this strategy is that it provides comprehensive and flexible control over the number, width and position of operational frequency bands, simply by stacking and arranging resonators vertically. This approach neither alters the original scatterer geometry nor introduces additional parameters. Furthermore, it simplifies multiband control, allowing the operating bandwidth and position to be adjusted by merely altering the number and order of resonator layers. Research indicates that this method enables the on-demand introduction of multiple Dirac cones, as well as the flexible adjustment of existing frequency band widths and Dirac cone spectral positions. Each cone can open a bandgap independently and generate topologically protected one-way edge states. Superlattice simulations, acoustic field simulations and experimental measurements collectively confirm that all frequency bands exhibit the low transmission loss and strong defect immunity characteristic of topologically protected edge states. The proposed layered paradigm in this work revolutionises conventional band control approaches, offering a new way to develop high-performance, customisable, multiband acoustic topological devices.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111233"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979806","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

Tunable dual-layer acoustic metacage for efficient sound insulation and transmission 可调双层隔音层，高效隔声和传声

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2026-03-15 Epub Date: 2026-01-27 DOI: 10.1016/j.apacoust.2026.111247

Chunhao Li , Cong Niu , Xiao Li , Guohao Zhang , Chuanjie Hu , Daxing Dong , Yangyang Fu

{"title":"Tunable dual-layer acoustic metacage for efficient sound insulation and transmission","authors":"Chunhao Li , Cong Niu , Xiao Li , Guohao Zhang , Chuanjie Hu , Daxing Dong , Yangyang Fu","doi":"10.1016/j.apacoust.2026.111247","DOIUrl":"10.1016/j.apacoust.2026.111247","url":null,"abstract":"<div><div>Acoustic metacages have been widely studied for noise insulation and reduction, but existing designs lack dynamic tunability, limiting their ability to support acoustic information transport. In this work, we propose a tunable acoustic metacage based on dual-layer metagratings to realize efficient dynamic switching between sound insulation and transmission. The dual-layer metagrating is designed with binary phase elements, providing a simple and robust method to modify the phase gradient of the acoustic metacage. By twisting the dual-layer metagratings, we achieve a dynamic transition between sound insulation and transmission through the 0th-order diffraction, governed by the parity-dependent diffraction law. We further design and experimentally demonstrate a tunable acoustic metacage that exhibits effective switching functionality for both sound insulation and transmission within the frequency range of 3.1 kHz to 4.0 kHz. Experimental results confirm the effective ventilation capability for both functionalities. With its simple design and tunable properties, the proposed acoustic metacage shows significant potential for applications in both noise reduction and acoustic communication.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111247"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079035","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

Acoustic alerting system for electric vehicles combining directional sound technique with object tracking—towards quieter urban environments 结合定向声技术和目标跟踪的电动汽车声报警系统——面向更安静的城市环境

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2026-03-15 Epub Date: 2026-01-17 DOI: 10.1016/j.apacoust.2026.111231

Hui Li , Ling Zheng , Jun Wu , Jian Pang

{"title":"Acoustic alerting system for electric vehicles combining directional sound technique with object tracking—towards quieter urban environments","authors":"Hui Li , Ling Zheng , Jun Wu , Jian Pang","doi":"10.1016/j.apacoust.2026.111231","DOIUrl":"10.1016/j.apacoust.2026.111231","url":null,"abstract":"<div><div>Electric vehicles (EVs) are mandated to emit warning sounds to notify pedestrians. However, it is desirable that these warning sounds are directed precisely to vulnerable road-users, thereby avoiding unnecessary noise pollution. This paper integrates directional sound technology with object-tracking in artificial Acoustic Vehicle Alerting Systems (AVAS) for electric vehicles. Directional sound is achieved using a loudspeaker array. Real-time locations of road users are accomplished via the vehicle-mounted surround-view cameras. They are integrated to generate a sound field that can adjust its direction in real-time according to the positions of moving road-users. This system supports seven operating cases, including multiple road users in the left, middle, right, left-middle, left–right and right-middle zones of the vehicle, plus the scenario of full vehicle surrounding by road users. Offline simulations and laboratory experiments validated the AVAS effectiveness, showing that the adaptive AVAS can produce targeted directional sound fields within a small angular region, dynamically track moving objects to adjust sound orientation in real time, and cut non-target noise by over 15 dB. In areas distant from moving objects, the warning sound remains at relatively low levels. By reducing unnecessary warning sound in non-critical areas, the proposed adaptive AVAS enhances the environmental performance of EVs and contributes to quieter urban environments.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111231"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146039318","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

Measuring occupational exposure to very high frequencies noise: Assessing measurement variability under controlled conditions 测量职业性接触甚高频噪声：在受控条件下评估测量变异性

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2026-03-01 Epub Date: 2025-12-22 DOI: 10.1016/j.apacoust.2025.111170

Jonathan Terroir

引用次数: 0

Highly efficient design of sound attenuation and ventilated metamaterial via machine learning and genetic algorithm 通过机器学习和遗传算法高效设计消声和通风超材料

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2026-03-01 Epub Date: 2025-12-21 DOI: 10.1016/j.apacoust.2025.111205

Shaoji Zhang , Bo Song , Lei Zhang , Aiguo Zhao , Cheng Shen , Xiangyan Meng , Jiajie Luo , Yucheng Yuan , Hao Li , Liang Gao , Yusheng Shi

{"title":"Highly efficient design of sound attenuation and ventilated metamaterial via machine learning and genetic algorithm","authors":"Shaoji Zhang , Bo Song , Lei Zhang , Aiguo Zhao , Cheng Shen , Xiangyan Meng , Jiajie Luo , Yucheng Yuan , Hao Li , Liang Gao , Yusheng Shi","doi":"10.1016/j.apacoust.2025.111205","DOIUrl":"10.1016/j.apacoust.2025.111205","url":null,"abstract":"<div><div>Ventilated acoustic metamaterials possess dual functionalities of ventilation and noise suppressing, which meets the needs of many scenarios. This work proposes a unit cell with high parametric tunability that allows flexible control of transmission loss peak quantities, facilitating customized ventilated metamaterials through cascaded unit cell configurations. To achieve the desired acoustic performance within specific frequency ranges, a partitioned optimization strategy was employed, targeting individual unit cells for distinct frequency sub-bands. By integrating machine learning and genetic algorithms, the geometrical parameters of the unit cell can be rapidly optimized to meet the acoustic performance target. In this work, we designed dual-band ventilated metamaterials and broadband ventilated metamaterials to demonstrated the framework’s effectiveness. Both ventilated metamaterials were investigated via finite element method and experiments. The transmission loss performances of experiments are perfect agreement with simulations. Machine learning model surrogate approach bypasses the repetitive process of modeling and finite element analysis, addressing the time-consuming and labor-intensive limitations of traditional trial–error and exhaustive methods, thereby establishing an accelerated pathway for ventilated metamaterial design.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"245 ","pages":"Article 111205"},"PeriodicalIF":3.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145840709","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

Experimental assessment of marine propeller noise under ventilation conditions in a towing tank 拖曳舱通风条件下船舶螺旋桨噪声的实验评定

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2026-03-01 Epub Date: 2025-12-18 DOI: 10.1016/j.apacoust.2025.111208

Adrian Portillo-Juan , Laura Botero-Bolívar , Leo Miguel González-Gutierrez , Simone Saettone , Esteban Ferrer

引用次数: 0