Applied Acoustics最新文献

{"title":"Acoustic stability and self-healing mechanism of nano-Ag coupled transducer for long-term high-temperature monitoring","authors":"Yiqing Gu,&nbsp;Yue Feng,&nbsp;Jiuhong Jia,&nbsp;Shan-Tung Tu","doi":"10.1016/j.apacoust.2025.110641","DOIUrl":"10.1016/j.apacoust.2025.110641","url":null,"abstract":"<div><div>Ultrasonic transducers play a critical role in structural health monitoring, particularly in high-temperature environments. In this work, nano-Ag coupled transducer is tested through insulation, cooling, and reheating stages to assess the acoustic performance and investigate underlying mechanisms. The results show that the stability of the resonance frequency indicated that its core acoustic properties are not significantly affected after operating at 350 °C for 60 h. Long-term high-temperature operation indicated a decline in SNR due to Kirkendall voids from non-equilibrium diffusion. Increases in the mechanical coupling coefficient and quality factor suggest a self-healing mechanism facilitated by grain boundary migration and atomic diffusion. Waveform distortions arose from thermal stress and mismatched thermal expansion coefficients in reheating.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110641"},"PeriodicalIF":3.4,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577078","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}

{"title":"Underwater low-frequency sound absorption of water-saturated porous meta-material with metallic chamber","authors":"Shuwei Ren ,&nbsp;Wei Sun ,&nbsp;Zijian Zhao ,&nbsp;Yiyang Liu ,&nbsp;Qian Wang ,&nbsp;Fei Che ,&nbsp;Haitao Wang ,&nbsp;Ye Lei ,&nbsp;Xiangyang Zeng","doi":"10.1016/j.apacoust.2025.110640","DOIUrl":"10.1016/j.apacoust.2025.110640","url":null,"abstract":"<div><div>This study proposes a class of absorbers comprising a water-saturated porous <em>meta</em>-material and a metallic chamber for low-frequency underwater sound absorption. A conventional type, cylindrical water-saturated sintered fiber metal (SFM) composites with metallic chamber (CWSFMMC) is selected as a starting point and extensively studied through theoretical analyses, numerical simulations, and experimental measurements, showing outstanding absorption capabilities for underwater sound waves across a broad range of hydrostatic pressures to clarify the absorption mechanism of water-saturated porous material with a metallic chamber. Then, employing the criterion of an equivalent hydraulic radius, a geometric gradient corrugated-core-like channel is utilized to coil the single-layer water-saturated SFM, thus creating a water-saturated porous <em>meta</em>-material. This process establishes an innovative, optimized type of geometric gradient space-coiling porous underwater sound-absorbing metamaterial (GGSPM) through a combined theoretical approach with the impedance-transfer method, Biot’s theory, and the SO algorithm. In addition, numerical simulation results indicated that the GGSPM achieves robust underwater sound absorption <span><math><mfenced><mrow><mrow><mi>α</mi><mo>≥</mo><mn>0.9</mn></mrow></mrow></mfenced></math></span> within a sub-wavelength regime (∼<span><math><mi>λ</mi></math></span>/27 at 1480 Hz), mutually confirming the theoretical analysis. Furthermore, the performance under oblique incident waves (elevation angle <span><math><msub><mi>γ</mi><mrow><mi>ea</mi></mrow></msub></math></span> and azimuth angle <span><math><msub><mi>γ</mi><mrow><mi>aa</mi></mrow></msub></math></span>) and the influence of material-related parameters (porosity <span><math><msub><mi>φ</mi><mi>s</mi></msub></math></span> and fiber diameter <span><math><msub><mi>d</mi><mi>f</mi></msub></math></span>) and gradient-specific acoustic impedance characteristics-related parameters (numbers of channels <span><math><msub><mi>n</mi><mn>2</mn></msub></math></span>, <span><math><msub><mi>n</mi><mn>3</mn></msub></math></span>, and <span><math><msub><mi>n</mi><mn>4</mn></msub></math></span>) are explored, showing significant potential for the development of next-generation high-performance underwater sound-absorption materials.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110640"},"PeriodicalIF":3.4,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577077","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}

{"title":"Reconfigurable frequency-selective acoustic coding metasurface for multifunctional wavefront manipulation","authors":"Siyuan Peng ,&nbsp;Ailing Song ,&nbsp;Yazhu Bai ,&nbsp;Chaoyu Sun ,&nbsp;Yanxun Xiang","doi":"10.1016/j.apacoust.2025.110658","DOIUrl":"10.1016/j.apacoust.2025.110658","url":null,"abstract":"<div><div>In this paper, a reconfigurable frequency-selective acoustic coding metasurface is proposed for realizing multifunctional wavefront manipulation including sound focusing, beam splitting, and Airy beam. The acoustic coding unit is composed of three rotatable slitted round tubes of different sizes with extended necks. Independent manipulation of the reflected phase at different frequencies and the conversion between logical unit 0 and logical unit 1 can be achieved by changing the rotation angle of each slitted round tube. The feasibility of the proposed reconfigurable acoustic coding metasurface with multifunctionality is verified by theoretical analysis, numerical simulations, and experimental results. The proposed metasurface has the advantages of reconfigurability, multifunctionality, and multifrequency. Our work provides promising potential applications in multi-beam shaping, energy harvesting, and functional devices with special dispersion properties.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110658"},"PeriodicalIF":3.4,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577075","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}

{"title":"Enhancement of aerosol agglomeration efficiency using sound with a constantly-changing-frequency","authors":"Ziyue Chen,&nbsp;Guangxue Zhang,&nbsp;Dingkun Yuan,&nbsp;Yunchao Li,&nbsp;Hailin Gu,&nbsp;Jiangrong Xu","doi":"10.1016/j.apacoust.2025.110659","DOIUrl":"10.1016/j.apacoust.2025.110659","url":null,"abstract":"<div><div>Acoustic agglomeration is an effective pre-treatment technology for controlling particulate emissions in industrial applications. To enhance agglomeration efficiency, a constantly-changing-frequency method is applied to fine droplet aerosols. The improvement in agglomeration efficiency is demonstrated by comparing the agglomeration of fine droplet aerosols in sound with a fixed-frequency and a constantly-changing-frequency. The results show that the light transmittance and agglomeration efficiency at a residence time of 30 s increases by 8 % and 4 % when using sound with a constantly-decreasing-frequency (6 to 1 kHz) compared to sound with a fixed-frequency (6 kHz). Additionally, it is found that the agglomeration efficiency increases proportionally with acoustic power at low intensities until nonlinear acoustic effects become apparent. Moreover, a higher initial mass concentration means that the separation distance between droplets is shorter, which will significantly increase the probability of collision between droplets and the aggregation rate caused by acoustic waves.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110659"},"PeriodicalIF":3.4,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562283","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}

{"title":"Benefits of monthly noise mapping compared to annual assessments - an analysis of Dublin Airport","authors":"Karina Einicke,&nbsp;John Kennedy","doi":"10.1016/j.apacoust.2025.110650","DOIUrl":"10.1016/j.apacoust.2025.110650","url":null,"abstract":"<div><div>This paper explores the impact of wind patterns and aircraft operations on noise exposure at Dublin Airport, investigating monthly variations in noise levels and their implications for surrounding communities. While annual noise maps are mandated under END 2002/49/EC, they cannot capture the fluctuations in noise levels resulting from changes in flight numbers and weather conditions. The study provides a detailed analysis of weather patterns, wind influences, runway closures, and population exposure. Findings reveal significant fluctuations in noise exposure, with Westerly operations varying between <figure><img></figure> throughout 2023, leading to area exposures ranging from <figure><img></figure> to <figure><img></figure> for noise levels exceeding <figure><img></figure>. A grid mapping approach was utilized to illustrate these variations, highlighting the temporal changes in noise impact across different months. The comparison of monthly area exposures shows fluctuations of up to <figure><img></figure> of a given area exposure within the <figure><img></figure> contour. This underscores the need for both monthly and annual noise maps, which provide precise and actionable insights into seasonal noise fluctuations. These maps enable data-driven communication strategies, inform placement of noise monitoring networks and facilitate effective community engagement.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110650"},"PeriodicalIF":3.4,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562284","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}

{"title":"How early reflections affect the stage acoustic conditions for solo musicians","authors":"Jannis Kriz ,&nbsp;Emanuele Porcinai ,&nbsp;Steffen Lepa ,&nbsp;Paula Klein ,&nbsp;Johannes M. Arend ,&nbsp;Stefan Weinzierl","doi":"10.1016/j.apacoust.2025.110644","DOIUrl":"10.1016/j.apacoust.2025.110644","url":null,"abstract":"<div><div>Early reflections are an important factor for the acoustic conditions on stage. To better understand their effect on the perception of musical performers, an experimental study was conducted to investigate how the time and direction of arrival, the diffusivity and the strength of early reflections affect the perceived acoustic quality on stage. Architectural variations of a typical stage structure were created in computer models. Combinations of different stage widths, canopy heights, and surface scattering were modelled using geometric acoustics and Boundary Element Method (BEM) simulations. Listening experiments carried out with musicians of different instrumental groups playing with real-time auralisations of these virtual concert hall stages revealed that both the time and direction of arrival of early reflections have a significant effect on the stage acoustic conditions perceived by solo musicians. In a larger battery of stage acoustic parameters determined for each architectural variation, the ‘Top to Sides’ and ‘Top to Horizontal’ ratios (TS, TH) proved to be the best predictors of the acoustic quality of the stage configurations presented, although the interrelation within the musicians seems to be less uniform than for room acoustic parameters from the audience perspective.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110644"},"PeriodicalIF":3.4,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"A fatigue life prediction method based on multi-signal fusion deep attention residual convolutional neural network","authors":"Chengying Zhao ,&nbsp;Jiajun Wang ,&nbsp;Fengxia He ,&nbsp;Xiaotian Bai ,&nbsp;Huaitao Shi ,&nbsp;Jialin Li ,&nbsp;Xianzhen Huang","doi":"10.1016/j.apacoust.2025.110646","DOIUrl":"10.1016/j.apacoust.2025.110646","url":null,"abstract":"<div><div>The traditional fatigue life prediction method is to construct a mathematical model of the material fatigue degradation process to achieve material fatigue life prediction. However, this method heavily relies on the prior knowledge and expertise of researchers, which limits its generalization. In order to address this limitation, a multi-signal fusion deep attention residual convolutional neural network (MSF-DARCN) model is proposed in this paper for fatigue life prediction. The acoustic emission signal and temperature signal of metallic materials throughout its entire life cycle are integrated into the MSF-DARCN model to learn the fatigue degradation process of the material from multiple information sources and improve its fatigue life prediction accuracy. At the same time, the MSF-DARCN model leverages both channel attention and temporal attention mechanisms to learn important feature information in input data and enhance its sensitivity to the feature information of material degradation process. Additionally, the stacked residual convolutional structures of the MSF-DARCN model are employed to extract the spatial features of input data to enhance its feature extraction ability. Finally, based on the fatigue life experiment of 304 stainless steel specimens, the accuracy and effectiveness of the MSF-DARCN model are analyzed. The results indicate that the MSF-DARCN model exhibits high accuracy in predicting fatigue life.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110646"},"PeriodicalIF":3.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551592","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}

{"title":"Performance prediction and inverse design of cylindrical plate-type acoustic metamaterials based on deep learning","authors":"Jiahan Huang ,&nbsp;Jianquan Chen ,&nbsp;Hanlan Mai ,&nbsp;Hengyang Wan ,&nbsp;Rong Chen ,&nbsp;Tingqiang He","doi":"10.1016/j.apacoust.2025.110633","DOIUrl":"10.1016/j.apacoust.2025.110633","url":null,"abstract":"<div><div>Acoustic metamaterials are artificial structures that possess distinctive acoustic characteristics, allowing for modulation effects that are challenging to achieve in the natural world. Nevertheless, the design of acoustic metamaterials is a challenging process due to the intricate relationship between their structural parameters and nonlinear performance. In view of the limitations of conventional design methodologies, which rely on the a priori knowledge of experts and are often hindered by prolonged computation times and the necessity for iterative trials to achieve design objectives, this paper introduces a deep learning-based method for performance prediction and inverse design of Cylindrical Plate-type Acoustic Metamaterials (CPAMs). The creation of a dataset is initiated by generating a large number of samples using a parametric model, with bandgap characteristics calculated through the finite element method. A forward-design deep learning model is then developed, predicting the upper and lower bandgap limits based on input structural parameters. Additionally, an inverse design model is constructed, enabling rapid generation of structural parameters based on desired acoustic performance. The results of the inverse design are validated through simulation and experimentation, confirming the accuracy and reliability of the model. This study demonstrates the potential of deep learning in efficiently designing complex acoustic metamaterials, offering a promising solution for CPAMs development.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"234 ","pages":"Article 110633"},"PeriodicalIF":3.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529029","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}

{"title":"Study of ultra-wideband acoustic metamaterial based on multi-order broadband resonance band coupling of ultra-micro perforated panel","authors":"Yujie Qian ,&nbsp;Bingxu Li ,&nbsp;Jie Zhang","doi":"10.1016/j.apacoust.2025.110643","DOIUrl":"10.1016/j.apacoust.2025.110643","url":null,"abstract":"<div><div>Ultra-micro perforated panels (UMPPs) have demonstrated exceptional potential for suppressing attenuation in higher-order resonance bands, enabling the design of structurally simple yet highly efficient acoustic absorbers. This study advances the field by introducing series- and parallel-coupled UMPP systems to achieve ultra-wideband sound absorption through the coupling of multi-order resonance bands. The acoustic impedance models for these configurations are developed, along with a detailed framework for calculating sound absorption coefficients. Theoretical investigations explore double- and triple-layer series UMPP structures as well as two- and three-unit parallel UMPP systems, each engineered to broaden the absorption bandwidth through resonance band integration. The influence of key structural parameters, such as cavity depth and perforation dimensions, on absorption performance is systematically analyzed. Experimental validation, conducted using impedance tube measurements for UMPPs with sub-0.1 mm perforations, confirms the accuracy of the theoretical predictions. Results reveal that multi-order wideband resonance coupling in UMPPs with minimal attenuation effects significantly enhances sound absorption bandwidth, offering a robust pathway for practical applications of ultra-wideband acoustic metamaterials in noise control. This study highlights the versatility of UMPP systems in achieving both low-frequency and broadband sound absorption, providing remarkable design flexibility while maintaining structural simplicity.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110643"},"PeriodicalIF":3.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551591","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}

{"title":"Adaptive Vold-Kalman filter FXLMS scheme for harmonic sound quality control","authors":"Yushuai Wang ,&nbsp;Feng Liu ,&nbsp;Kongcheng Zuo ,&nbsp;Zhaoyong Sun","doi":"10.1016/j.apacoust.2025.110645","DOIUrl":"10.1016/j.apacoust.2025.110645","url":null,"abstract":"<div><div>Active sound quality control (ASQC) systems for engine noise in an automobile always involve the task of improving the order sound linearity with revolving speed and balancing the proportion of each order’s contribution to the total noise. However, most current ASQC algorithms can not control the sound from the perspective of the order quantitative target. Therefore, a new algorithm, in this paper, is proposed to control the harmonic sound in terms of its order profiles. The algorithm uses the adaptive Vold-Kalman filter (VKF) to track the concerned order of disturbance and schedules the gain factors by calculating the ratio of predefined target amplitudes to the tracked disturbance amplitudes. The gain factors are used to tune the controller output of corresponding orders, which enables the algorithm to equalize single or multiple orders independently. Furthermore, simulated sounds and real engine noises are used to demonstrate the effectiveness. The proposed algorithm can equalize the order(s) sound amplitude to a much narrower range. The results reveal that it is capable of improving the linearity and balancing the proportion of orders and can be further implemented to control the harmonic sound quality.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"234 ","pages":"Article 110645"},"PeriodicalIF":3.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534660","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}