Applied Acoustics最新文献

Rail defect detection based on mode wave packet separation algorithm of sparse point array 基于稀疏点阵模式波包分离算法的钢轨缺陷检测

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-01 DOI: 10.1016/j.apacoust.2025.110901

Xicheng Feng , Kang Li , Jingmang Xu , Tao Liao , Jian Yang , Ping Wang , Jun Lai

{"title":"Rail defect detection based on mode wave packet separation algorithm of sparse point array","authors":"Xicheng Feng , Kang Li , Jingmang Xu , Tao Liao , Jian Yang , Ping Wang , Jun Lai","doi":"10.1016/j.apacoust.2025.110901","DOIUrl":"10.1016/j.apacoust.2025.110901","url":null,"abstract":"<div><div>The number of guided wave modes in irregular and complex cross-sectional structures is so abundant that it is easy to fail to separate the wave packets of each mode and to detect the reflected echoes during damage detection. In order to meet the needs of non-destructive testing and structural health monitoring for single mode analysis, this paper innovatively proposes a wave packet separation algorithm based on a sparse point array, establishes a practical structural defect detection workflow, and realizes for the first time the accurate identification and localization of rail defects under a few received points. In this paper, the frequency response matrix of the wave packet is constructed by the propagation characteristics of the waveguide, and the mode separation formula based on the sparse point matrix is derived by combining the pseudo-inverse algorithm. At the same time, the selection rule of the single-point excitation point position is determined, and the accurate propagation characteristics of the waveguide structure are obtained by the two-dimensional Fourier transform, and an optimal receiving distance calculation method is proposed according to the principle of waveform information discrimination. The structural defect detection workflow based on mode wave packet separation is further formed, and the separation of each mode wave packet and the reflection wave packet is realized. Finally, in the case where all the receiving points are arranged in the rail web, the simulation realizes the localization of the defects in the rail head, rail web, and rail base, as well as the identification of the defect size and longitudinal position, and is verified by experiment.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110901"},"PeriodicalIF":3.4,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517863","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

Predictive models for urgency perception in railway crossing alarm signals: Development and applications for Argentina 铁路道口报警信号中紧急感知的预测模型：阿根廷的发展和应用

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-01 DOI: 10.1016/j.apacoust.2025.110926

Iván Kaspierowicz, Shin-ichi Sato

{"title":"Predictive models for urgency perception in railway crossing alarm signals: Development and applications for Argentina","authors":"Iván Kaspierowicz, Shin-ichi Sato","doi":"10.1016/j.apacoust.2025.110926","DOIUrl":"10.1016/j.apacoust.2025.110926","url":null,"abstract":"<div><div>This study develops predictive models for the perceived urgency of railway crossing alarm signals, focusing on both frequency and temporal variables. Two subjective tests using incomplete pairwise comparison matrices are conducted to evaluate the effects of these variables. In the first test, pitch and harmonic attenuation are examined as frequency-related factors, while in the second test, speed and attack time are assessed as temporal factors. For each test, nine synthetic alarm signals are generated based on the alarm sounds used in Buenos Aires. The results demonstrate that all four variables significantly influence perceived urgency, with temporal variables exerting a stronger effect than frequency variables. Multiple regression analyses reveal that higher harmonic amplitudes and increased pitch enhance perceived urgency, with harmonic attenuation playing a more dominant role. Similarly, faster speeds and shorter attack times heighten perceived urgency, with nearly equal contributions from both variables. Based on these findings, the study proposes optimized alarm configurations to maximize perceived urgency while adhering to Argentinean regulations. These insights highlight opportunities for improved alarm design to enhance safety at railway crossings.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110926"},"PeriodicalIF":3.4,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517729","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 switch based on rotatable sonic crystal with multiresonant scatterers 基于多共振散射体可旋转声晶体的声开关

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-01 DOI: 10.1016/j.apacoust.2025.110913

David Ramírez-Solana , Valentino Sangiorgio , Rubén Picó , Javier Redondo

{"title":"Acoustic switch based on rotatable sonic crystal with multiresonant scatterers","authors":"David Ramírez-Solana , Valentino Sangiorgio , Rubén Picó , Javier Redondo","doi":"10.1016/j.apacoust.2025.110913","DOIUrl":"10.1016/j.apacoust.2025.110913","url":null,"abstract":"<div><div>This research introduces an acoustic switch based on a Sonic Crystal (SC) containing multiresonant scatterers. The SC operates in a square 2D lattice configuration with scatterers containing Helmholtz resonators (HRs) tuned to different frequencies. By rotating all scatterers by 90°, the interaction between the Bragg bandgaps (Bragg BGs) and the HRs' BGs can be modified, allowing selective frequency filtering and control of wave propagation. Although SCs operating at low frequencies have been widely investigated, the implementation of reconfigurable acoustic switches in the low-to-mid frequency range (500–2500 Hz) remains scarce. This is one of the novelties highlighted in the present study. The simplicity and cost-effectiveness of the 3D-printed structure, coupled with its hollow design that minimizes absorption, enhances its practicality. Experimental validation conducted in an anechoic chamber shows a significant change in acoustic insulation performance, with a maximum contrast ratio of 20 dB. This design opens up new possibilities for noise reduction in urban and industrial environments, adaptive acoustic environments, acoustic sensors, and even acoustic energy harvesting.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110913"},"PeriodicalIF":3.4,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517864","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

Low-frequency sound absorption enhancement in multi-layer honeycomb metamaterials with embedded long-curved-neck Helmholtz resonators 嵌入长曲颈亥姆霍兹谐振腔的多层蜂窝超材料低频吸声增强研究

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-01 DOI: 10.1016/j.apacoust.2025.110909

Ziming Song , Wei Chen , Shengzhe Jin , Hongwei Zhang , Feihu Shan , Sichao Qu

{"title":"Low-frequency sound absorption enhancement in multi-layer honeycomb metamaterials with embedded long-curved-neck Helmholtz resonators","authors":"Ziming Song , Wei Chen , Shengzhe Jin , Hongwei Zhang , Feihu Shan , Sichao Qu","doi":"10.1016/j.apacoust.2025.110909","DOIUrl":"10.1016/j.apacoust.2025.110909","url":null,"abstract":"<div><div>To overcome the narrow absorption bandwidth of conventional Helmholtz resonator-based acoustic metamaterials in the low-frequency range, this study proposes a multi-layer honeycomb acoustic metamaterial with embedded long-curved-neck Helmholtz resonators (ELCN-HR). A comprehensive methodology integrating theoretical analysis, numerical simulations, and experimental testing is employed to systematically investigate the modulation of resonance frequency by neck geometric parameters and the multi-resonance mode superposition mechanism induced by hierarchical coupling. The results show that the micro-perforation diameter contributes the most in all parameters. Furthermore, the elongated ELCN-HR design substantially reduces resonance frequencies while improving acoustic wave dissipation efficiency. Additionally, the multi-layered coupling architecture excites localized resonance peaks across adjacent frequency bands, facilitating continuous spectral coupling. Optimized simulations demonstrate that the proposed metamaterial achieves a half-absorption bandwidth of 448 Hz (285–733 Hz), representing a 32% enhancement compared to conventional single-layer Helmholtz coupled structures (340 Hz). Moreover, the onset frequency for <em>α</em> > 0.5 is reduced from 720 Hz to 285 Hz, significantly extending low-frequency absorption performance. Mechanistic analysis confirms that multi-scale acoustic impedance gradient matching plays a critical role in enhancing broadband energy dissipation. These findings provide a novel design paradigm for developing low-frequency broadband sound-absorbing metamaterials.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110909"},"PeriodicalIF":3.4,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517862","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

Improving low frequency sound absorption of panel absorbers using point mass 利用点质量改善板式吸声器的低频吸声性能

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-06-30 DOI: 10.1016/j.apacoust.2025.110890

Mehmet Sait Özer, Friedrich Beyer, M. Ercan Altinsoy

引用次数: 0

Modeling and simulation of different vocal fold vibration patterns related to hyperfunctional dysphonic symptoms 与功能亢进发声障碍症状相关的不同声带振动模式的建模和模拟

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-06-30 DOI: 10.1016/j.apacoust.2025.110906

Arwa Awad , Mohamed A.A. Eldosoky , Ahmed M. Soliman , Nourelhoda M. Mahmoud

{"title":"Modeling and simulation of different vocal fold vibration patterns related to hyperfunctional dysphonic symptoms","authors":"Arwa Awad , Mohamed A.A. Eldosoky , Ahmed M. Soliman , Nourelhoda M. Mahmoud","doi":"10.1016/j.apacoust.2025.110906","DOIUrl":"10.1016/j.apacoust.2025.110906","url":null,"abstract":"<div><div>Voice plays a crucial role in human communication, any change in voice quality can significantly affect daily interactions including clarity and comfort in speaking. Hyperfunctional dysphonia is a functional voice disorder caused by excessive vocal muscle activity. The vibrations of vocal folds (VFs) are essential for maintaining voice quality, and their kinematic parameters provide valuable insights into voice disorders. This study presents a kinematic model for simulating various VFs vibration patterns associated with hyperfunctional dysphonia. The model evaluates both symmetrical and asymmetrical left–right vibratory phases, providing a visual representation of VFs shape and motion through synthetic kymograms. Validation is performed by comparing these synthetic kymograms with those from previously published studies, using error metrics based on glottis area differences, Structural Similarity Index Measure (SSIM), and Oriented Fast Rotated Brief (ORB) similarity metrics. Each technique is applied to four different phonation types with varying initial oscillation phase values. Results indicate that the proposed model achieves low error value in the first validation technique, with minimum and maximum error values of 0 and 0.0005 for symmetry, and 0.00035 and 0.0932 for asymmetry, respectively. Furthermore, it demonstrates strong similarity between the second and third validation techniques, with maximum and minimum similarity values of 1 and 0.857 for symmetry, and 1 and 0.70393 for asymmetry, respectively. This model enhances the understanding of mucosal wave (MW) dynamics and improves the diagnostic capabilities for hyperfunctional dysphonia in kymographic imaging. By offering more comprehensive view of VFs motion, it facilitates better interpretation of the diverse features relevant to diagnosing hyperfunctional dysphonia.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110906"},"PeriodicalIF":3.4,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517419","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

Optimizing loudspeaker placement based on modal domain analysis for multizone sound field reproduction 基于模态域分析的多区声场再现扬声器布置优化

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-06-28 DOI: 10.1016/j.apacoust.2025.110904

Xin Wen , Haijun Wu , Dianlong Chen , Weikang Jiang

{"title":"Optimizing loudspeaker placement based on modal domain analysis for multizone sound field reproduction","authors":"Xin Wen , Haijun Wu , Dianlong Chen , Weikang Jiang","doi":"10.1016/j.apacoust.2025.110904","DOIUrl":"10.1016/j.apacoust.2025.110904","url":null,"abstract":"<div><div>Multizone sound field reproduction attempts to produce independent sound environments in a number of zones of space, providing the listener with a personalized listening experience. Many reproduction methods have been proposed to optimize the driving weights to improve reproduction performance for a given loudspeaker array configuration. Recently, various methods have explored to optimize loudspeaker placement for further improving the performance of multizone sound field reproduction. However, these methods are currently based on the pressure matching method to carry out the placement optimization study. This paper proposes a loudspeaker placement optimization method based on modal domain. An optimization model for multizone sound field reproduction is used to determine the global modal coefficients that enable the desired sound field to be accurately reproduced in the bright zone while limiting the whole sound field energy within the dark zone, where the global modal coefficients are transformed to the local modal coefficients by the harmonic translation theorem. The constrained matching pursuit method is used to select the optimal loudspeaker placement according to the obtained global modal coefficients. The driving weights of the selected loudspeakers are calculated by the pressure matching method. The simulation results and experimental results demonstrated the good potential of the proposed loudspeaker placement optimization method in multizone sound field reproduction.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110904"},"PeriodicalIF":3.4,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144510706","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

Baseline-free defects localization in CFRP laminates by acoustic nonlinear response of broadband guided waves 基于宽带导波声非线性响应的CFRP层合板无基线缺陷定位

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-06-27 DOI: 10.1016/j.apacoust.2025.110916

Zifeng Lan , Osamu Saito , Yoji Okabe , Mingxi Deng , Weibin Li

{"title":"Baseline-free defects localization in CFRP laminates by acoustic nonlinear response of broadband guided waves","authors":"Zifeng Lan , Osamu Saito , Yoji Okabe , Mingxi Deng , Weibin Li","doi":"10.1016/j.apacoust.2025.110916","DOIUrl":"10.1016/j.apacoust.2025.110916","url":null,"abstract":"<div><div>This study proposes a novel strategy for localization of defect-induced acoustic nonlinear response by means of circular laser measurements of ultrasonic guided waves. Two long-duration chirp signals are applied to actuate two broadband guided wave bursts. The measurements capture out-of-plane velocity along two circular paths. A post-processing algorithm is developed to estimate wave directions relative to the scanning circles through signal symmetry and correlation matrix analysis. A wave source map is then constructed based on these estimated directions to reveal the wave source. Initial validation experiments successfully demonstrated precise localization of an ultrasonic guided wave source (PZT actuator) in an undamaged specimen. The methodology was further applied to impact damage localization in a woven CFRP laminate through integration with nonlinear ultrasonic guided waves. The method successfully utilized nonlinear harmonics to localize the defect-induced acoustic nonlinear response, confirming its capability for accurate impact damage identification. This research presents a baseline-free approach for impact damage localization in quasi-isotropic composites, particularly advantageous for materials with unknown properties.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110916"},"PeriodicalIF":3.4,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489841","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

Research on pipeline flange leakage detection method based on random forest and Pearson correlation coefficient 基于随机森林和Pearson相关系数的管道法兰泄漏检测方法研究

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-06-27 DOI: 10.1016/j.apacoust.2025.110918

Lihua Huang , Bin Hu , Shuting Wan , Bai Lu

{"title":"Research on pipeline flange leakage detection method based on random forest and Pearson correlation coefficient","authors":"Lihua Huang , Bin Hu , Shuting Wan , Bai Lu","doi":"10.1016/j.apacoust.2025.110918","DOIUrl":"10.1016/j.apacoust.2025.110918","url":null,"abstract":"<div><div>Pipeline flange leakage is influenced by multiple factors, including discharge area, temperature, pressure, flow velocity, and installation position. Conventional leakage prediction models suffer from computational inefficiency and reduced generalizability due to high-dimensional feature spaces and redundant parameters. To overcome these limitations, this study introduces an interpretable hybrid framework integrating Random Forest (RF)-driven feature selection with Pearson correlation analysis for high-precision leakage diagnostics. Vibration signals were systematically acquired from paired upper and lower flanges at leakage-critical regions, followed by extraction of multicomponent features including total vibration energy, spectral kurtosis, centroid frequency, Shannon entropy, and bidirectional cross-correlation metrics. Through rigorous RF-based recursive feature elimination, four dominant sensitivity indicators were identified: inter-flange cross-correlation (CC), upper-flange centroid frequency (CF), total vibration energy (TVE) of both flanges, and downstream entropy (DE). Subsequent Pearson correlation mapping revealed minimal collinearity (|<em>r</em>| < 0.4) between CC, CF, and lower-flange TVE, establishing these orthogonal features as prediction model inputs. A Multilayer Perceptron (MLP) network is trained to establish the leakage prediction model. Experimental results demonstrate high accuracy of the proposed method, achieving a mean squared error (<em>MSE</em>) of approximately 6.8 and a coefficient of determination (<em>R<sup>2</sup></em>) of 0.97. The feature dimensionality reduction not only improves prediction accuracy but also reduces iteration cycles.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110918"},"PeriodicalIF":3.4,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489842","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

The influence of thermoacoustic effect and microstructure parameters on acoustic performance of porous ceramic fiber material 热声效应和微观结构参数对多孔陶瓷纤维材料声学性能的影响

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-06-27 DOI: 10.1016/j.apacoust.2025.110915

Qingshan Zhu, Jia Yu, Hongji Zhu

{"title":"The influence of thermoacoustic effect and microstructure parameters on acoustic performance of porous ceramic fiber material","authors":"Qingshan Zhu, Jia Yu, Hongji Zhu","doi":"10.1016/j.apacoust.2025.110915","DOIUrl":"10.1016/j.apacoust.2025.110915","url":null,"abstract":"<div><div>Based on the principles of linear thermoacoustic theory and the impedance tube model, this study investigates the influence of temperature distribution and microstructural parameters on the sound absorption performance of porous ceramic fiber materials. The equivalent parameters of the linear thermoacoustic theory were obtained by using the reconstructed 3D random microstructure model and JCAPL model. Then the impedance tube model was established to calculate the sound absorption coefficient of the porous fiber material under the uneven temperature field. The results show that the influence of thermoacoustic effect on the sound absorption coefficient is mainly in the middle and low frequency, and the influence amplitude is extremely dependent on the frequency. When the temperature gradient is 20 K/mm, the absorption coefficient will reach the minimum value of −5.53 at 90 Hz. At 290 Hz, the absorption coefficient reaches 0.88, which is 17.6 times higher than 0.05 when the thermoacoustic effect is not considered. The influence of the thermoacoustic effect on the absorption coefficient decreases as the interface temperature increases. Conversely, the impact of the thermoacoustic effect intensifies with a greater absolute value of the temperature gradient. When the temperature gradient is negative, the sound absorption coefficient becomes negative in the mid and low frequency ranges. Additionally, a reduction in porosity and fiber radius leads to an increased influence of the thermoacoustic effect on the absorption coefficient. The influence of the thermoacoustic effect diminishes as the fiber orientation angle approaches 0°.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110915"},"PeriodicalIF":3.4,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489839","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