Applied Acoustics最新文献

{"title":"Experimental study on the horn effect of loaded patterned tires","authors":"Ning-Xue Li ,&nbsp;Yong-Bin Zhang ,&nbsp;Chuan-Xing Bi ,&nbsp;Liang Xu","doi":"10.1016/j.apacoust.2025.111053","DOIUrl":"10.1016/j.apacoust.2025.111053","url":null,"abstract":"<div><div>With the progressive optimization of powertrain noise and the rapid advancement of pure electric vehicles, tire/road noise has become the dominant component of overall vehicle noise. Consequently, it has become a critical factor in user evaluations of vehicle performance. Among the mechanisms contributing to tire/road noise, the horn effect plays an important role. It amplifies the noise by up to 10–20 dB as sound propagates through the horn-like space between the tire tread and the road surface. Previous studies on the horn effect have mainly focused on slick tires. In contrast, this paper experimentally analyzes the horn effect for patterned tires, which more closely resemble actual traffic conditions. The horn effect amplification factors were measured for three tire types: a slick tire, a tire with longitudinal grooves, and a tire with both longitudinal and transverse grooves. Measurements were taken under both loaded and unloaded conditions. Based on the experimental results, the influence of tread patterns on the horn effect is investigated. The results demonstrate significant differences in amplification factors between patterned tires and the slick tire. These differences are attributed to resonance mechanisms within the contact patch’s pipe network and the increased complexity of sound wave reflection paths on patterned tire surfaces. Furthermore, these differences become more pronounced when observing tire noise away from the direct front of the tire.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"242 ","pages":"Article 111053"},"PeriodicalIF":3.4,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021091","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":"Emotional impact of the number and combination of sound sources in green and blue spaces: An auditory study","authors":"Shuping Huang ,&nbsp;Yao Huang ,&nbsp;Youheng Bai ,&nbsp;Jiehui Zhang ,&nbsp;Yuhong Wang ,&nbsp;Fanhua Kong ,&nbsp;Qunyue Liu","doi":"10.1016/j.apacoust.2025.111052","DOIUrl":"10.1016/j.apacoust.2025.111052","url":null,"abstract":"<div><div>This study examines how combinations of sound sources in green and blue spaces influence emotional responses, thereby elucidating the mechanisms through which these acoustic elements affect mood and contribute to positive soundscape experiences. Seven common sound sources were selected to create 64 audio combinations, using stream sounds as background and incorporating various geophysical sounds (rain drops, wind blowing, tree rustling) and biological sounds (bird songs, frog songs, insect sounds). The listening experiment involved 120 university students who evaluated these soundscape combinations through emotional ratings across three dimensions: pleasure, arousal, and dominance. Data were analyzed using linear mixed models, exploratory data analysis, and piecewise linear regression techniques. The findings revealed that: (1) sound source types significantly affected emotional responses: compositions featuring geophysical sounds substantially enhanced relaxation and calmness, whereas those containing biological sounds markedly increased participants’ arousal and pleasure levels; (2) individuals with varying anxiety levels demonstrated distinct emotional responses to identical audio stimuli: participants with mild anxiety reported significantly higher pleasure ratings compared to other groups, while those without anxiety exhibited reduced tension; (3) as the number of sound sources increased, pleasure gradually diminished, while arousal and dominance levels significantly intensified. Additional analysis identified that the optimal range for eliciting positive emotional experiences such as pleasure, calmness, and relaxation was between 1–5 sound sources, with excessive sound layering diminishing these beneficial effects.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"241 ","pages":"Article 111052"},"PeriodicalIF":3.4,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019251","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":"Compact segmented meta-liners for enhanced acoustic absorption with grazing flow","authors":"Yang Meng ,&nbsp;Thomas Humbert ,&nbsp;Vicente Romero-García ,&nbsp;Jean-Philippe Groby ,&nbsp;Marc Versaevel ,&nbsp;Jacky Mardjono ,&nbsp;Gwénaël Gabard","doi":"10.1016/j.apacoust.2025.111040","DOIUrl":"10.1016/j.apacoust.2025.111040","url":null,"abstract":"<div><div>This work demonstrates the inherent limitations of conventional acoustic liners in achieving efficient low-frequency absorption in one-dimensional transmission problems with grazing flow. We show that absorption bounds generally exist when the acoustic treatment is modeled by a uniform impedance. Additionally, flow-induced non-reciprocity makes the design of absorbers more challenging for incident waves propagating with the flow compared to those propagating against the flow. To address these challenges, we propose a segmented meta-liner and a corresponding design methodology. The meta-liner consists of perforated faceplates backed with Helmholtz resonators, which incorporate embedded tilted necks. Wiremesh is placed at the neck openings to introduce additional acoustic losses. Our design methodology combines a numerical model with experimental impedance data. This method avoids errors introduced by theoretical or empirical impedance models and simplifies geometric design for practical implementation, thereby providing robust solutions for sound absorption under grazing flow. Experimental results confirm the deep subwavelength absorption of 3D-printed samples. All designs surpass the absorption limits of uniform impedance boundaries, a common assumption in conventional liner design. Furthermore, experimental results indicate that these designs exhibit robust absorption across low flow Mach numbers between 0 and 0.2.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"241 ","pages":"Article 111040"},"PeriodicalIF":3.4,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145010536","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":"Corrigendum to “Application of spectral immission directivity for long-term environmental noise measurements” [Appl. Acoust. 239 (2025) 110848]","authors":"Jure Murovec,&nbsp;Andrej Hvastja,&nbsp;Nejc Cerkovnik,&nbsp;Jurij Prezelj","doi":"10.1016/j.apacoust.2025.111059","DOIUrl":"10.1016/j.apacoust.2025.111059","url":null,"abstract":"","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"241 ","pages":"Article 111059"},"PeriodicalIF":3.4,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145048777","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":"Hybrid multistable coupled asymmetric stochastic resonance system and its application in ship radiated noise signal detection","authors":"Guohui Li,&nbsp;Qian Huang,&nbsp;Hong Yang","doi":"10.1016/j.apacoust.2025.111026","DOIUrl":"10.1016/j.apacoust.2025.111026","url":null,"abstract":"<div><div>Under the background of complex marine environmental noise, processing of ship radiated noise signal (SRNS) is a hot topic in the current underwater research field, and it is also a major problem that plagues the underwater acoustics. In order to achieve effective detection of SRNS, a hybrid multistable coupled asymmetric stochastic resonance system is proposed and used to conduct research on SRNS detection. Firstly, aiming at the limitation of the classical tristable potential function, a multistable asymmetric stochastic resonance (MASR) system is constructed by introducing the multi-parameter adjustable coefficient term and Gaussian potential model, and its output characteristic are analyzed. On this basis, in order to further improve the system performance, the coupled mechanism is introduced into the MASR, and a hybrid multistable coupled asymmetric stochastic resonance (HMCASR) system is proposed. The signal-to-noise ratio gain and signal detection ability of the system are enhanced through synergistic effect, and the performance of the HMCASR system is analyzed theoretically by combining the stationary probability density and the signal-to-noise ratio gain. Secondly, based on the good global optimization ability of the greater cane rat algorithm (GCRA), an adaptive parameter determination mechanism of SVMD optimized by GCRA is constructed, and adaptive successive variational mode decomposition (ASVMD) is proposed, and the signal to be measured is decomposed by it. Then, in order to solve the problem of difficulty in detecting SNRS in complex marine environment, a SNRS detection method based on adaptive successive variational mode decomposition and hybrid multistable coupled asymmetric stochastic resonance is proposed, named the proposed detection method AH. The neural population dynamic optimization algorithm is used to optimize the HMCASR parameters, and the signal to be measured is adaptively decomposed through ASVMD to select the optimal IMF to input to HMCASR for detection. Finally, the feasibility and efficiency of AH are verified through simulation experiment and measured experiment. In the measured experiment, the output signal amplitude of AH can reach 10.3600 V, and the output signal-to-noise ratio gain can reach 18.6088 dB.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"241 ","pages":"Article 111026"},"PeriodicalIF":3.4,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145007498","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":"Hybrid active noise control system for remote microphone based virtual sensing with two compensation filters","authors":"Shota Toyooka,&nbsp;Yoshinobu Kajikawa","doi":"10.1016/j.apacoust.2025.111039","DOIUrl":"10.1016/j.apacoust.2025.111039","url":null,"abstract":"<div><div>This paper proposes a hybrid active noise control system (ANC) for remote microphone-based virtual sensing with two compensation filters. The proposed system can accurately estimate the desired signal at the desired location by creating compensation filters for multiple noise sources. Two compensation filters are created for each primary path from the noise source to the error microphone and the desired point in feed-forward and feedback ANC. An additional adaptive filter decomposes the mixed signal captured by the error microphone into individual source components. Each component is then processed using its corresponding compensation filter in both feedforward and feedback control, allowing the system to reconstruct the desired signal with high accuracy. Simulation results using measured impulse responses demonstrate that the proposed system improves noise reduction by approximately 20 dB compared to the conventional hybrid ANC system.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"241 ","pages":"Article 111039"},"PeriodicalIF":3.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988395","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":"Improving speech intelligibility in in-vehicle audio systems under severe noise conditions using bark domain formant shifting","authors":"Huan-Yu Dong ,&nbsp;Bo Dong ,&nbsp;Yu Shen ,&nbsp;Chang-Myung Lee","doi":"10.1016/j.apacoust.2025.111034","DOIUrl":"10.1016/j.apacoust.2025.111034","url":null,"abstract":"<div><div>During vehicle operation, the interior noise environment typically exhibits nonstationary and time-varying characteristics. Elevated background noise levels can significantly impair the intelligibility of audio systems such as navigation and voice broadcasts, thereby hindering the driver’s understanding of voice information and increasing potential driving risks. This paper proposes a speech signal preprocessing method that incorporates a novel Bark-domain formant-shifting technique and speech enhancement to improve intelligibility under complex and dynamic driving conditions. To address potential high-noise environments, an adaptive gain control algorithm is incorporated, thereby enhancing the effectiveness of intelligibility improvement under such conditions. Vehicle tests were conducted using a digital artificial head under various driving conditions and road environments. The performance and stability of the proposed method were verified using objective evaluation metrics. Additionally, a subjective listening test was conducted to complement the objective analysis. Both objective and subjective evaluation results indicate that the proposed method significantly improves the intelligibility of in-vehicle audio systems in severe noise conditions.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"241 ","pages":"Article 111034"},"PeriodicalIF":3.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988398","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":"Spherical metacage for low-frequency noise reduction","authors":"Anyu Xu,&nbsp;Kian Meng Lim,&nbsp;Heow Pueh Lee","doi":"10.1016/j.apacoust.2025.111044","DOIUrl":"10.1016/j.apacoust.2025.111044","url":null,"abstract":"<div><div>Low-frequency noise attenuation is crucial for effective noise control, and this study presents an innovative spherical metacage designed for this purpose. The metacage is composed of membrane plate-type components with inclined edges, creating a structure fully covered by lightweight, efficient acoustical metamaterials specifically targeting low-frequency noise. Aesthetic appeal is enhanced by the use of colored PVC sheets in the design. Through experimentally validated scaled numerical simulations, the study confirms the metacage's ability to mitigate low-frequency noise via the resonance of coupled Helmholtz resonator cavities formed by elastic membranes. The spherical configuration optimizes sonic enclosure to maximize sound insulation. The design achieves dual-peak sound insulation and establishes a wide bandgap below 1000 Hz, marked by high insertion loss. Additionally, the substitution of five membrane components with adjustable, ventilated Helmholtz resonator components preserves an effective bandgap across two different frequency regions. These ventilated components attenuate noise by utilizing the resonance of side cavities, where the passage of sound waves disrupts small air masses at the orifices. This arrangement expands the effective frequency range while minimizing the amplification effects of internal cavity resonance. The proposed reconfigured structure thus provides a promising solution for low-frequency noise attenuation, while also meeting ventilation requirements.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"241 ","pages":"Article 111044"},"PeriodicalIF":3.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988396","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":"Probability-based prediction of crack propagation in lightly reinforced concrete beams using acoustic emission technique","authors":"Vivek Vishwakarma,&nbsp;Sonalisa Ray","doi":"10.1016/j.apacoust.2025.111035","DOIUrl":"10.1016/j.apacoust.2025.111035","url":null,"abstract":"<div><div>This study presents a novel approach for characterizing crack propagation in lightly reinforced concrete beams using acoustic emission techniques. The primary focus remains to simulate the mode I crack path, estimate the crack length, and to generate 3D crack profiles. Lightly reinforced concrete beams were designed according to Bosco and Carpinteri's minimum reinforcement criteria and tested under centre-point CMOD control flexure testing. An unsupervised Gaussian Mixture Model clustering technique was employed to categorize acoustic emission events into distinct clusters based on their average frequency and rise angle. This approach enabled the selection of highly probable mode I acoustic emission events based on their posterior probability. A spatial binning method was applied to the filtered tensile crack events to simulate the crack path and 3D crack profile for the lightly reinforced beam specimen. The study also incorporated a temporal binning strategy to predict the crack length. A monotonic constraint was applied to the filtered events, balancing noise reduction and sensitivity in detecting crack length. The prediction of the crack growth was subsequently compared with the results of the digital image correlation. This research demonstrates the effectiveness of acoustic emission in simulating real-time crack attributes in reinforced concrete structures.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"241 ","pages":"Article 111035"},"PeriodicalIF":3.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988397","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":"Broadband sound absorption design of coupled Helmholtz resonator arrays with perforated panels","authors":"Shuai Wang ,&nbsp;Liuhai He ,&nbsp;Chunchuan Liu ,&nbsp;Fengming Li","doi":"10.1016/j.apacoust.2025.111046","DOIUrl":"10.1016/j.apacoust.2025.111046","url":null,"abstract":"<div><div>This paper proposes a parametric design methodology based on coupling analysis to improve the acoustic performance of conventional Helmholtz resonator arrays with perforated panels, aiming to achieve enhanced low-frequency and broadband sound absorption without structural modifications. Porous material linings are considered within the cavities of the Helmholtz resonators using the double porosity theory. The sound absorption coefficient (SAC) is obtained based on the acoustic impedance in a circular tube and the equivalent circuit method. An acoustic experiment and numerical simulation using the finite element method are carried out for comparison. The complex frequency plane method is applied to elucidate the coupling effects among the absorbers. By coupling the perforated panels with Helmholtz resonator arrays, the zeros of the distinct absorbers move along the positive direction of the imaginary frequency axis, resulting in an acoustic absorber with high SAC and widened sound absorption band. The paper provides a method to design high-performance absorbers under geometric constraints, enabling tailored noise control solutions without structural redesign.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"241 ","pages":"Article 111046"},"PeriodicalIF":3.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988394","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}