Applied Acoustics最新文献

{"title":"An extended iterative filtering and composite multiscale fractional-order Boltzmann-Shannon interaction entropy for rolling bearing fault diagnosis","authors":"Youming Wang,&nbsp;Kai Zhu,&nbsp;Xianzhi Wang,&nbsp;Gaige Chen","doi":"10.1016/j.apacoust.2025.110699","DOIUrl":"10.1016/j.apacoust.2025.110699","url":null,"abstract":"<div><div>Feature extraction remains a challenging task in bearing fault diagnosis due to the presence of nonlinearity, nonstationarity, and noise interference. To address this issue, an extended iterative filtering and composite multiscale fractional-order Boltzmann-Shannon interaction entropy (EIF-CMFBSIE) are proposed for for rolling bearing fault diagnosis in complex environments. First, an EIF method is proposed to decompose the vibration signal into multiple intrinsic mode functions (IMFs) by extending the lengths of both ends of the signal through waveform matching. Second, multi-scale coarse-graining is applied to each IMF, fractional-order Boltzmann-Shannon interaction entropy (FBISE) is computed for each coarse-grained sequence by incorporating fractional-order parameters, and CMFBSIE is obtained through composite averaging to construct a multi-dimensional fault feature set. Next, the joint approximate diagonalization of eigenmatrices (JADE) method is employed to eliminate redundant information and fuse the fault features. The fused feature sets are then input into the kernel extreme learning machine (KELM) classifier for multi-fault identification. The proposed EIF-CMFBSIE method demonstrates excellent performance in analyzing the nonlinear dynamic complexity and irregularity of vibration signals in noisy environments. In the fault diagnosis tests based on three bearing simulation test benches, compared with the existing five fault diagnosis methods, the recognition accuracy of EIF-CMFBSIE is increased by 13.33%, and there is a significant advantage in computational efficiency, in which the EIF shortens the decomposition time by 65–96% compared with the existing methods. The experimental results indicate that the method can not only accurately identify different fault types and the degree of faults, but also has a short calculation time and better overall performance.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"236 ","pages":"Article 110699"},"PeriodicalIF":3.4,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817603","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":"Low-frequency bandgap broadening of single-phase shuriken-like acoustic metastructure through coupling design for sound insulation","authors":"Dongxu Guo ,&nbsp;Xiaolong Zhang ,&nbsp;Ruilan Tian ,&nbsp;Luqi Chen","doi":"10.1016/j.apacoust.2025.110725","DOIUrl":"10.1016/j.apacoust.2025.110725","url":null,"abstract":"<div><div>Sound insulation has long been a prosperous subject with practical interest because it can reduce severe noise from moving vehicles. In this study, a single-phase shuriken-like acoustic metamaterial (SSAM) is proposed to broaden the low-frequency bandgap through gradient coupling design. Based on Bloch's theorem and finite element simulation method, the dispersion relation and transmission are studied, and the influence of structural geometric parameters on bandgap is investigated. The widest bandgap can reach 197.55 Hz, and the lowest frequency can be reduced to 54.96 Hz. Several combinations of metastructures with low-frequency continuous bandgap are constructed by gradient and hybrid coupling design for the SSAM structures. The calculated transmission in the frequency range of 1 to 10000 Hz showed an excellent increase in effective and perfect attenuation width. The influence of geometric configuration and parameters on the trend of the bandgap is qualitatively analyzed by combining the local resonance mechanism and an effective mass-spring system. The insertion loss (<em>IL</em>) of SSAM is obtained through numerical simulation, which is verified by the experiment. The experimental results show that the SSAM exhibits a high-pitched <em>IL</em> value of 24.9 dB at 870 Hz. These results indicate that the proposed SSAM configuration with distributed masses and periodical arrangement can realize a good broadband sound transmission loss (<em>TL</em>) by decreasing the opening frequencies of bandgaps. The proposed strategy of single-phase structural coupling designs facilitates the use of large-scale low-frequency noise canceling efficiently, promoting its potential engineering application. This work provides a new and effective method for generating wide bandgaps of honeycomb structures in complex low-frequency noise environments.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"236 ","pages":"Article 110725"},"PeriodicalIF":3.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817601","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":"Circular statistics vector for improving phase shift migration imaging of wrinkles in composites using ultrasonic array","authors":"Haiyan Zhang ,&nbsp;Shuqian Liu ,&nbsp;Hui Zhang ,&nbsp;Yiting Chen ,&nbsp;Jinfeng Si ,&nbsp;Ma Shiwei ,&nbsp;Qi Zhu","doi":"10.1016/j.apacoust.2025.110727","DOIUrl":"10.1016/j.apacoust.2025.110727","url":null,"abstract":"<div><div>Multilayer composites are essential for aerospace, automotive industry and medical devices, but subtle wrinkles inside will significantly impair its mechanical performance. The phase shift migration (PSM) algorithm is well-suited for imaging defects in multilayer composites due to its layer-by-layer wavefield extrapolation technique. However, it performs poorly for ultrasonic detection of wrinkles in composites because weak wrinkle echo signals are mixed and superimposed with the interlayer reflections, mechanical noise and multiple reflection waves. Based on the motivation, an imaging method of circular statistics vector factor weighted PSM (CSVF-PSM) is proposed. Firstly, the instantaneous phase of the received signal is extracted using the Hilbert transform. The cosine and sine components of the phase are abstracted into circular statistical vector (CSV). Secondly, the CSV factor (CSVF) in the frequency domain is constructed to characterize the phase distribution consistency at any pixel, which is multiplied by the original frequency domain matrix of PSM in the initial wavefield. Finally, by wavefield extrapolation, the wavefield at each layer is corrected with CSVF to obtain more accurate wavefield at different depths. The experimental results indicate that CSVF-PSM significantly improves computation efficiency compared to the conventional time-domain total focusing method (TFM) algorithm, with an improvement of at least 8.67 times. Besides, compared to PSM and sign coherence factor weighted phase shift migration (SCF-PSM), the CSVF-PSM improves the imaging clarity and texture contrast for subtle wrinkles, with the error less than 10% for the wrinkle angle detection.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"236 ","pages":"Article 110727"},"PeriodicalIF":3.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817602","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":"Assessing human responses to construction noise using EEG and EDA signal features with Consideration of individual sensitivity","authors":"Sungjoo Hwang ,&nbsp;Sungchan Lee ,&nbsp;Meesung Lee ,&nbsp;Seulbi Lee ,&nbsp;Minji Choi","doi":"10.1016/j.apacoust.2025.110717","DOIUrl":"10.1016/j.apacoust.2025.110717","url":null,"abstract":"<div><div>Construction noise significantly affects the mental and physical well-being of both workers and urban residents. Recent studies on noise stress monitoring have explored physiological sensing-based techniques for efficient noise management, primarily focusing on human responses to sound pressure levels. However, these studies often overlook variations in individual responses and personal traits, such as noise sensitivity. This study examines the effectiveness of combining electrodermal activity (EDA) and electroencephalography (EEG) signal features with individual noise sensitivity to assess individually varying stress responses to construction noise. Data were collected from 20 participants exposed to 40, 60, and 80 dBA noise levels, recorded at an actual construction site. Additionally, participants’ noise sensitivity as a personal trait and subjective annoyance as a stress response to noise were evaluated. The findings indicate that EDA and EEG signals provide more accurate and nuanced assessments of individual stress responses than traditional noise evaluations based solely on sound pressure levels. Integrating individual sensitivity traits with physiological data enhanced the accuracy and personalization of stress assessments, highlighting the importance of considering individual differences in noise management strategies. These insights underscore the need to advance noise regulations beyond sound pressure thresholds, advocating for human-centered approaches that incorporate physiological monitoring.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"236 ","pages":"Article 110717"},"PeriodicalIF":3.4,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800424","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":"Range-dimensional frequency band extension hyper beamforming","authors":"Pengzhuo Li ,&nbsp;Xiaochuan Ma ,&nbsp;Xingyuan Pei ,&nbsp;Yubo Hu ,&nbsp;Anlei Huang","doi":"10.1016/j.apacoust.2025.110712","DOIUrl":"10.1016/j.apacoust.2025.110712","url":null,"abstract":"<div><div>Range estimation is crucial in sonar systems. To enhance range detection capability of active sonar, we propose a range-dimensional frequency band extension hyper beamforming method that improves range resolution and sidelobe suppression performance. The received signal's band is divided into narrowband frequency points. The phase shifts of these frequency points induced by the target distance form a geometric series. A bidirectional linear prediction (LP)-based virtual frequency band extension method exploits phase shift correlations to generate the predicted band. By expanding signal bandwidth, range resolution is preliminarily improved. After extension, the frequency band is divided into two half-bandwidth sub-bands for scanning at different ranges to obtain the beamforming outputs. A “sum” beam is formed by summing the magnitudes of the two sub-band beams, while a “difference” beam is obtained by taking the magnitude of their difference. At the target distance, the “sum” beam reaches its maximum, while the “difference” beam reaches its minimum, both sharing the same sidelobe locations. The hyper beam exponent is chosen to exponentiate the “sum” and “difference” beams, adjusting their contribution weights in the calculation. By amplitude cancellation, the range-dimensional output is optimized. Through nonlinear processing, a range-dimensional power spectrum with low sidelobes and a narrowed main lobe is obtained. Furthermore, we present a fast implementation using complex operations, fast Fourier transform (FFT), and inverse fast Fourier transform (IFFT), improving computational efficiency. Simulations demonstrate the proposed method delivers excellent range resolution and sidelobe suppression capability, while dynamic and static experimental data further validate the effectiveness.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"236 ","pages":"Article 110712"},"PeriodicalIF":3.4,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792636","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":"Design of broadband dish-shaped transducer with giant magnetostrictive material","authors":"Bing Gao ,&nbsp;Xiuxian Xu ,&nbsp;Nengtong Zhao ,&nbsp;Mingzhi Yang ,&nbsp;Chaoyi Peng ,&nbsp;Bohao Huang","doi":"10.1016/j.apacoust.2025.110700","DOIUrl":"10.1016/j.apacoust.2025.110700","url":null,"abstract":"<div><div>In this paper, based on giant magnetostrictive material (GMM), a low frequency, broadband and high power underwater dish transducer (UDT) is proposed and optimized in considering of the coupling factors of electromagnetic–mechanical-acoustic multiple physical fields. Firstly, to reduce the influence of non-uniform magnetic field distribution of GMM rod on acoustic wave quality, a multi-rod magnetic circuit structure is designed. Secondly, the vibration mode of UDT is analyzed, and the influence of different structural parameters on the sensitivity of the output wave response is explored. Finally, in order to achieve the target requirements of low frequency and broadband, this paper combines the U-net neural network and Grey Wolf algorithm improved particle swarm optimization, by this way, which can optimize the total ability in terms of both magnetic circuit structure and mechanical structure. The optimized simulation results show that the maximum transmit current response (TCR) is 187.15 dB and the undulation within the band is 5.03 dB. A prototype is manufactured based on the optimized design parameters. The experimental results show that the maximum TCR of the prototype developed in the target water depth is 187.32 dB, the undulation within the band is 5.36 dB, and the performance is good, which verifies the feasibility and accuracy of the design method.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"236 ","pages":"Article 110700"},"PeriodicalIF":3.4,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792637","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":"Maximum multi-domain nonlinear Gini index deconvolution and its application to early fault diagnosis of planetary gearboxes","authors":"Xuyang Xie,&nbsp;Zichun Yang,&nbsp;Lei Zhang,&nbsp;Luotao Xie,&nbsp;Ziyi Zou,&nbsp;Guobing Chen","doi":"10.1016/j.apacoust.2025.110708","DOIUrl":"10.1016/j.apacoust.2025.110708","url":null,"abstract":"<div><div>Blind deconvolution is an effective technique to recover fault-related periodic impulses within vibration signals. Early-stage faults in planetary gearboxes exhibit weak features that are easily obscured by background noise and other interferences. However, existing blind deconvolution methods relying on traditional sparsity measures struggle with performance degradation under complex interference conditions. To solve this problem, a maximum multi-domain nonlinear Gini index deconvolution method is proposed in this paper to precisely extract the weak fault features from the affected signals of the planetary gearboxes. Firstly, the advanced nonlinear Gini index is used to quantify both impulsivity and cyclostationarity in time and frequency domains, and a multi-domain nonlinear Gini index is constructed as the deconvolution objective function through geometric mean, without requiring prior period. Secondly, the sand cat swarm optimization algorithm combined with the generalized spherical coordinate transformation is employed to solve the optimal filter, sidestepping suboptimal solutions and securing the best possible filtered output. Finally, the filtered signal undergoes a squared envelope spectrum analysis to uncover the fault features, thereby achieving early fault diagnosis. The effectiveness of the proposed method is verified using simulated and experimental data, and the results show that the proposed method can achieve accurate diagnosis of early faults in planetary gearboxes, revealing superior performance in extracting weak fault features and suppressing interferences over other blind deconvolution methods.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"236 ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791074","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":"Acoustic performance in accommodation buildings: From LEED and WELL application to the development of an acoustic classification method and a priority index","authors":"Costanza Vittoria Fiorini ,&nbsp;Miriam Di Matteo ,&nbsp;Anna Tarsitano ,&nbsp;Andrea Vallati","doi":"10.1016/j.apacoust.2025.110649","DOIUrl":"10.1016/j.apacoust.2025.110649","url":null,"abstract":"<div><div>Lately, prioritizing the comfort of building occupants has become a key focus in the construction sector. At international level, this is evident with the prominence gained by rating sytems such as LEED and WELL, through which a third party certifies buildings with respect to well-being and impact on the environment and human health. At National level, instead, regulations such as Minimum Environmental Criteria (DM 23/06/2022), provide general indications, aimed at a rationalizing consumptions and promoting sustainable design and operations practices, which directly affect the comfort of inhabitants and workers.</div><div>In the framework of the various criteria considered, acoustic performance is increasing its relevance. The standards differ from each other and do not always require the same levels of quality and performance. Therefore, it is necessary to evaluate and prioritize the superior quality ones on a case-by-case basis. Moreover, not all uses have uniquely identified limits. For example, accommodation facilities lack specific guidelines, which leads to the adoption of personal protocols by owners and designers, resulting in the inability to make comparisons and classifications at national and international levels.</div><div>In this study, the spaces of a hospitality facility, housed in a historic building and undergoing refurbishment, were qualified following LEED and WELL certifications, chosen as a target for their supranational value. In field measurements and numerical simulations were executed on the building to determine sound transmission and reverberation time pre and post renovation, and to assess how retrofit interventions impact the protocols’ parameters and credits. The procedure highlighted the areas of the building which need acoustic improvements, as well as identified actions that would yield the greatest impact for the purpose of earning the certifications. As a useful tool for similar applications, a method for the acoustic classification of rooms and buildings by means of a single index (global Acoustic Performance Level) was developed, assuming as acoustic quality descriptors the predictive and in-situ insulation of partitions and the reverberation time. Moreover a Priority Index is proposed to find areas or elements for which interventions take precedence, set to the minimum assumed for the classification procedure and based on use, in terms of acoustic criticality and occupancy, and geometrical features of a space.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"236 ","pages":"Article 110649"},"PeriodicalIF":3.4,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792635","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 correction model for the noise emissions of light electric vehicles during acceleration","authors":"Sacha Baclet ,&nbsp;Julien Cesbron ,&nbsp;Pierre Aumond ,&nbsp;Arnaud Can ,&nbsp;Romain Rumpler","doi":"10.1016/j.apacoust.2025.110713","DOIUrl":"10.1016/j.apacoust.2025.110713","url":null,"abstract":"<div><div>The transition from light internal combustion engine (ICE) vehicles, such as cars and vans, to light electric vehicles (EVs) presents an opportunity to reduce road traffic noise exposure in urban environments, which still needs to be quantified. Although the noise emissions of light ICE vehicles are generally well understood, including during acceleration and deceleration, the noise emitted by light EVs has so far not been studied as thoroughly, in particular during acceleration.</div><div>This study thus proposes a correction model for the noise emissions of light EVs during acceleration, based on pass-by measurements under reference conditions. Data were collected for 6 vehicle models at both steady speed and full acceleration. The difference in noise levels between these two conditions was analysed to develop the correction model.</div><div>This correction model accounts for both speed and acceleration at an octave-band level. The resulting model shows that acceleration has no impact on the noise emissions of light EVs in the 63 and 125 Hz octave bands, and that acceleration may increase the overall A-weighted emissions of a light EV by up to 5 dBA, at 20 km/h. Furthermore, the analysis suggests that deceleration does not increase noise emissions for light EVs.</div><div>This contribution paves the way for the integration of EV-specific noise emissions into noise exposure assessment frameworks, enabling a more comprehensive understanding of the potential benefits associated with the transition towards EVs.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"236 ","pages":"Article 110713"},"PeriodicalIF":3.4,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785434","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":"Sound transmission performance of the periodic Helmholtz resonator array in the presence of grazing flow","authors":"Rong Xue ,&nbsp;Cheuk Ming Mak ,&nbsp;Chenzhi Cai ,&nbsp;Kuen Wai Ma","doi":"10.1016/j.apacoust.2025.110715","DOIUrl":"10.1016/j.apacoust.2025.110715","url":null,"abstract":"<div><div>This paper presents experimental investigations into the acoustic behavior of the Helmholtz resonator model in the presence of grazing flow. The four-microphone method is performed to measure the transmission loss performance of the resonator model under flow speeds of 0–20 m/s, and the particle image velocimetry (PIV) measurement is adopted to evaluate the fluid characteristics of the resonator neck. The flow effect on the acoustic performance of the resonator model is derived by using the curve fit technique. An empirical model is established to predict the transmission loss of the Helmholtz resonator in the presence of the grazing flow. The empirical model is added to the transfer matrix method to predict the transmission loss of the period Helmholtz resonator model under different grazing flow speeds. The PIV experiment results reveal the fluid dynamics in the neck region of the resonator model. Based on the acoustic and PIV experimental analysis, this work can provide a prediction of the acoustic performance of the periodic Helmholtz resonator array in the presence of grazing flow.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"236 ","pages":"Article 110715"},"PeriodicalIF":3.4,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785433","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}