Applied Acoustics最新文献_第6页

The subjective annoyance evaluation of computer assembly workshop noise based on statistical features of energy entropy weighted time-varying specific loudness 基于能量熵加权时变比响度统计特征的计算机装配车间噪声主观恼人评价

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-30 DOI: 10.1016/j.apacoust.2025.110953

Haitao Su , Shilong Xu , Jialun Li , Hongzhi Hu , Cuifeng Xu

{"title":"The subjective annoyance evaluation of computer assembly workshop noise based on statistical features of energy entropy weighted time-varying specific loudness","authors":"Haitao Su , Shilong Xu , Jialun Li , Hongzhi Hu , Cuifeng Xu","doi":"10.1016/j.apacoust.2025.110953","DOIUrl":"10.1016/j.apacoust.2025.110953","url":null,"abstract":"<div><div>With the growing concern over the impact of workshop noise on workers’ health, a dependable method to evaluate the workshop noise has become imperative. This study introduces an advanced subjective annoyance evaluation model tailored for workshop noise. This model integrates statistical features derived from energy entropy weighted time-varying specific loudness alongside convolutional neural network (CNN). The subjective evaluation results of the computer assembly workshop noise samples are collected. Then, the frequency domain is divided into 24 critical bands. The time-varying specific loudness of the noise samples and the energy entropy weighting factors for each band were calculated. The weighted time-varying specific loudness is obtained by multiplying each band specific loudness with its corresponding weighting factor. Subsequently, the specific loudness of each band was summed over time, and the results of histogram were used to characterize the noise. Finally, to achieve subjective annoyance evaluation, the Gated recurrent unit and Attention mechanisms were added between the pooling layer and fully connected layer of CNN, which enhanced the network’s processing capability. Experimental results indicate that the MAE MAPE and RMSE of the subjective annoyance evaluation model proposed in this article are 0.709, 23.0% and 0.878 respectively. This proved that the the proposed approach exhibits excellent accuracy and high efficiency.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110953"},"PeriodicalIF":3.4,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722943","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

MSSCNN: An intelligent heart disease diagnosis method based on heart sound signals under limited data 基于有限数据下心音信号的智能心脏病诊断方法

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-29 DOI: 10.1016/j.apacoust.2025.110979

Suiyan Wang , Xiangfeng Wang , Pengfei Liang , Yang Liu , Zhongliang Xie , Xiaoming Yuan

{"title":"MSSCNN: An intelligent heart disease diagnosis method based on heart sound signals under limited data","authors":"Suiyan Wang , Xiangfeng Wang , Pengfei Liang , Yang Liu , Zhongliang Xie , Xiaoming Yuan","doi":"10.1016/j.apacoust.2025.110979","DOIUrl":"10.1016/j.apacoust.2025.110979","url":null,"abstract":"<div><div>Heart auscultation, a simple and effective diagnostic approach for heart diseases, heavily relies on the subjective judgment and clinical experience of physicians, necessitating the urgent development of objective and intelligent heart sound diagnostic methods. Deep learning technology provides a new solution for this purpose, but its effectiveness depends on sufficient high-quality training data. To address the challenges of scarce training data and the limitations of existing methods in handling data scarcity, a novel diagnostic approach named MSSCNN, based on Mel Spectrograms (MSs) and an improved Siamese convolutional neural network (SCNN), is proposed in this paper to enhance intelligent heart disease diagnosis under limited data conditions. Specifically, the method first converts the heart sound signals into MSs and randomly selects a small number of samples as training data. Next, pair these training samples pairwise within the group to increase the number of training samples, and feed these paired samples into the MSSCNN model for feature extraction and classification. Then, input the test set samples into the model for performance testing. Finally, two experimental cases confirm that MSSCNN can efficiently utilize limited training samples to tackle the scarce data issue and achieve better intelligent heart disease diagnosis. This study not only provides new methods to solve the problem of scarce training data, but also opens up new avenues for objective, accurate and timely diagnosis of cardiovascular diseases.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110979"},"PeriodicalIF":3.4,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721614","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 novel combined near-field acoustic holography using extrapolation and sparse method and its application conditions 基于外推法和稀疏法的新型联合近场声全息技术及其应用条件研究

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-29 DOI: 10.1016/j.apacoust.2025.110977

Zixin Zhang , Youhong Xiao

{"title":"Research on novel combined near-field acoustic holography using extrapolation and sparse method and its application conditions","authors":"Zixin Zhang , Youhong Xiao","doi":"10.1016/j.apacoust.2025.110977","DOIUrl":"10.1016/j.apacoust.2025.110977","url":null,"abstract":"<div><div>In the field of sound source identification, near-field acoustic holography (NAH) based on the boundary element method (BEM) is a powerful technique. However, its performance is limited by the number of measurement points and the size of the holographic aperture. Although patch NAH and compressed-sensing-based NAH can effectively improve reconstruction accuracy when the number of measurement points is limited, the reconstruction accuracy cannot be guaranteed when the number of measurement points or the holographic aperture is excessively small. In this study, a novel combined NAH is proposed. The sound field extrapolation method is used to expand the holographic aperture, and the sparse method is employed to reconstruct the surface velocity of the sound source. Numerical simulations and experimental results demonstrate the effectiveness of the proposed method. The results demonstrate that when the holographic surface uses regularly sampling and the extrapolation aperture is extrapolated by two element spacings along the transverse and longitudinal directions of the initial holographic aperture, the proposed method enhances reconstruction accuracy compared to standalone sparse BEM-NAH.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110977"},"PeriodicalIF":3.4,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721740","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

African vultures optimization algorithm based enhanced VMD with CWT and k-medoids for removal of ocular artifacts from EEG signals 基于CWT和k-介质增强VMD的非洲秃鹫优化算法去除脑电信号中的眼伪影

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-29 DOI: 10.1016/j.apacoust.2025.110970

Bommala Silpa, Malaya Kumar Hota

{"title":"African vultures optimization algorithm based enhanced VMD with CWT and k-medoids for removal of ocular artifacts from EEG signals","authors":"Bommala Silpa, Malaya Kumar Hota","doi":"10.1016/j.apacoust.2025.110970","DOIUrl":"10.1016/j.apacoust.2025.110970","url":null,"abstract":"<div><div>Electroencephalogram (EEG) records the neuronal activities of the human brain, which helps in the detection and diagnosis of different neurological disorders. The recorded EEG signals are mostly contaminated by ocular artifacts (OAs). Variational mode decomposition (VMD) is a non-recursive signal decomposition technique that has been used to eliminate OAs. However, the performance of the VMD algorithm is affected by the selection of the number of modes (<em>K</em>) and penalty factor (α) parameters. Hence, an enhanced VMD is proposed in this research by optimizing the parameters of the VMD algorithm using the African vulture’s optimization algorithm with the combination of energy entropy and ensemble kurtosis as an objective function. First, an enhanced VMD decomposes an EEG signal into a defined number of band-limited intrinsic mode functions (BIMFs). Next, the BIMFs related to OAs are identified based on the power spectral density-based distance metric, and then the noisy BIMFs are added to estimate the OA signal. Then, the combination of continuous wavelet transform and k-medoids clustering techniques is used to extract only OA-contaminated intervals from the estimated OA signal. Finally, the extracted OA signal is subtracted from the contaminated EEG signal. The proposed method is validated with EEG signals from the Mendeley, Keirn EEG, and CAP sleep datasets. The comparative analysis shows the superiority of the proposed work over existing techniques. Further, the channel-wise and length-wise analysis reveals the efficacy of the proposed work.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110970"},"PeriodicalIF":3.4,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721708","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

Impact of building façade design on road and rooftop noises using the discontinuous Galerkin finite element method 用不连续伽辽金有限元法研究建筑立面设计对道路和屋顶噪声的影响

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-28 DOI: 10.1016/j.apacoust.2025.110935

Sophia Julia Feriani , Allan Peter Engsig-Karup , Cheol-Ho Jeong

{"title":"Impact of building façade design on road and rooftop noises using the discontinuous Galerkin finite element method","authors":"Sophia Julia Feriani , Allan Peter Engsig-Karup , Cheol-Ho Jeong","doi":"10.1016/j.apacoust.2025.110935","DOIUrl":"10.1016/j.apacoust.2025.110935","url":null,"abstract":"<div><div>Noise pollution in cities impacts inhabitants' well-being and health, so reducing their noise exposure is a matter of public health. At the design stage, architects and engineers can exploit environmental acoustics simulation tools that can accurately predict the sound level resulting from a building façade design. This study numerically assesses the acoustic impact of different building façade design strategies for two sound source locations: one corresponding to road traffic noise and another to noise emitted by building services equipment, mounted on a rooftop. The outdoor sound propagation from a noise source in an urban setting is simulated in 3D using the nodal discontinuous Galerkin finite element method that captures wave phenomena at low frequencies more accurately than geometrical acoustics methods. This study finds that reflections from an opposite building in a narrow street canyon increase the sound level by up to 12 dB for a rooftop source. Also, it is found that balconies can have a screening or intensifying effect on the noise by −3.5 dB to 6.3 dB, depending on the location of the source. Furthermore, balconies can amplify the sound level at low frequencies due to resonances specific to the balcony dimensions. The balcony elements and the building façade redirect the sound. For balconies, the effect is minor, producing a maximum ±1 dB deviation, while the façade tilting has significant impacts regardless of the receivers for rooftop sources, −8.4 dB to 4.6 dB. The balcony elements and the building façade have mixed effects for road traffic sources. The numerical results were validated experimentally with a 1:10 scale model.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110935"},"PeriodicalIF":3.4,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714336","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

Tool wear detection using novel acoustic emission features and a two-stage Mann-Whitney U test 使用新型声发射特征和两阶段Mann-Whitney U测试进行工具磨损检测

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-25 DOI: 10.1016/j.apacoust.2025.110952

Duc-Thuan Nguyen , Jong-Myon Kim

{"title":"Tool wear detection using novel acoustic emission features and a two-stage Mann-Whitney U test","authors":"Duc-Thuan Nguyen , Jong-Myon Kim","doi":"10.1016/j.apacoust.2025.110952","DOIUrl":"10.1016/j.apacoust.2025.110952","url":null,"abstract":"<div><div>Accurate detection of tool wear is a critical challenge in manufacturing due to the complex and nonlinear nature of acoustic emission (AE) signals generated during machining. Conventional methods, including machine learning and deep learning, often fail to detect the subtle changes associated with early tool wear and suffer from a lack of explainability in their decision-making processes. This paper introduces three novel AE features: rank-based entropy, fractal geometry indicator, and chaos quantifier. These features are specifically designed to capture the intricate dynamics of AE signals that traditional methods overlook. To validate the discriminative power of these features, a two-stage Mann-Whitney <em>U</em> test is employed, combining the new features with other advanced AE features to differentiate between worn and unworn tools. Experimental results from milling and drilling machine tests show that the proposed approach significantly improves detection sensitivity, accuracy, and interpretability compared to existing methods, providing a more robust framework for tool wear detection. The source code for this paper is available at: <span><span>https://github.com/thuan-researcher/novel-ae-features-two-stage-mu</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110952"},"PeriodicalIF":3.4,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702419","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

Modular low-frequency broadband acoustic absorption structure based on deep ring slits 基于深环形狭缝的模块化低频宽带吸声结构

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-24 DOI: 10.1016/j.apacoust.2025.110966

Liang Shi , Tiejun Song , Xiao Liang , Zhongyuan Tang , Yu Ye , Hanya Zhu

{"title":"Modular low-frequency broadband acoustic absorption structure based on deep ring slits","authors":"Liang Shi , Tiejun Song , Xiao Liang , Zhongyuan Tang , Yu Ye , Hanya Zhu","doi":"10.1016/j.apacoust.2025.110966","DOIUrl":"10.1016/j.apacoust.2025.110966","url":null,"abstract":"<div><div>For resonant cavity-type low-frequency broadband acoustic absorbing metamaterials, the broadband acoustic absorption performance relies on the coupling of multiple acoustic absorption peaks. The restriction of small pore size results in a decrease in the bandwidth of individual absorption peaks as the number of coupling units increases and the surface area of the structure expands. Notably, this phenomenon manifests more prominently at lower frequencies. Meanwhile, the realization of broadband sound absorption relies on the precise tuning of small hole parameters. In this study, we propose a modular structure of depth annular slits based on the micro-slit structure. The structure is designed with a series of depth annular micro slits with different inner diameters, which greatly improves the capture efficiency of low-frequency sound waves. Achieving a superior low-frequency broadband acoustic absorption effect with a limited number of units. The finite element model and theoretical model of the structure were constructed, and the sound absorption coefficient was calculated. Furthermore, the intrinsic sound absorption mechanism of the structure is elucidated from the perspectives of absolute sound pressure and sound velocity distribution, relative acoustic impedance, and complex frequency plane. Additionally, the impact of parameter variations on sound absorption curves was investigated. To verify the accuracy of the finite element calculations, experimental samples were fabricated for impedance tube experiments. The results demonstrate that the designed structure effectively realizes low-frequency broadband sound absorption with an average absorption coefficient of 0.89 in the range of 350–710 Hz with five units.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110966"},"PeriodicalIF":3.4,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702418","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

A Helmholtz resonator based on spiral neck acoustic metamaterial for noise reduction 基于螺旋颈声学超材料的亥姆霍兹谐振器的降噪研究

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-24 DOI: 10.1016/j.apacoust.2025.110957

Samira Khodabakhsh, Mohammad R. Movahhedy, Kaivan Mohammadi

{"title":"A Helmholtz resonator based on spiral neck acoustic metamaterial for noise reduction","authors":"Samira Khodabakhsh, Mohammad R. Movahhedy, Kaivan Mohammadi","doi":"10.1016/j.apacoust.2025.110957","DOIUrl":"10.1016/j.apacoust.2025.110957","url":null,"abstract":"<div><div>Reduction of the noise generated by sound waves emitted from various sources in the audible range is of utmost importance for comfort of the residents. A novel approach to addressing this issue involves the use of acoustic metamaterials to suppress sound transmission. In this study, we focus on Helmholtz resonator-based acoustic metamaterials and propose a compact unit cell that achieves enhanced acoustic performance by shifting the sound transmission loss (STL) peak to lower frequencies without increasing the geometric footprint. By extending the length of the neck of the resonator through a spiral configuration, the resonant frequency is shifted downward, achieving STL at lower frequencies compared to conventional straight-neck designs −approximately reduced from 5000 Hz to 3000 Hz− due to localized resonance phenomena. Band structure analysis further highlights a downward shift in the first band gap for the spiral-neck unit cell design. Numerical simulations were performed to investigate the effect of various geometric parameters on the STL frequency and amplitude. Experimental validation was carried out using impedance tube measurements on 3D-printed samples. The results showed a 6 % deviation in the STL peak for C-shape resonators and a 12 % deviation for spiral-neck designs, attributed to geometric complexity. Scaling up to larger 5 × 5 arrays and adjusting the channel thickness according to fabrication precision (±0.2 mm) minimized discrepancies, emphasizing the importance of precise fabrication for consistent acoustic behavior. Furthermore, incorporating thermoviscous boundary layer effects −particularly in narrow air channels− in the simulations, improved agreement between simulation and experimental results.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110957"},"PeriodicalIF":3.4,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696709","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

Bandgap-controlled acoustic interlayers for low-loss topology transmission 用于低损耗拓扑传输的带隙控制声学中间层

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-23 DOI: 10.1016/j.apacoust.2025.110959

Xiao Liang , Zhen Wang , Jiangxia Luo , Nansha Gao

{"title":"Bandgap-controlled acoustic interlayers for low-loss topology transmission","authors":"Xiao Liang , Zhen Wang , Jiangxia Luo , Nansha Gao","doi":"10.1016/j.apacoust.2025.110959","DOIUrl":"10.1016/j.apacoust.2025.110959","url":null,"abstract":"<div><div>Directional induction of acoustic waves has gained increasing attention in recent years. Conventional acoustic topological insulators have drawbacks such as geometrical complexity and difficult processing, which increase the difficulty of engineering applications. In this paper, we propose a scatterer-free and easy-to-machine sonic crystal structure to realize topological acoustic transmission by embedding a cylindrical cavity on a solid substrate. Compared with conventional acoustic metamaterial plates, this structure can significantly enhance the acoustic transmission capability due to the absence of dissipative effect of resonant cavities. The acoustic interlayer structure was designed in parallel, and it was found that band modulation could be realized by changing the distance between the interlayers. This modulation method is different from the traditional method of changing the scatterer structure, which is simpler and more convenient. In addition, the design of the interlayer with no scatterer on the surface allows the placement of various acoustic sensors in the interlayer to realize specific functions. This study provides new design ideas for lightweight devices, high-precision acoustic sensing and low-loss acoustic devices. It also provides a more convenient and effective tuning method to accelerate the engineering of acoustic metamaterials.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110959"},"PeriodicalIF":3.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687250","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

Application of extra reference signals for feedforward active noise control 附加参考信号在前馈主动噪声控制中的应用

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-23 DOI: 10.1016/j.apacoust.2025.110956

László Sujbert

{"title":"Application of extra reference signals for feedforward active noise control","authors":"László Sujbert","doi":"10.1016/j.apacoust.2025.110956","DOIUrl":"10.1016/j.apacoust.2025.110956","url":null,"abstract":"<div><div>By the increasing computational power of the controllers, multiple reference feedforward active noise control is of increasing interest. It is often utilized if the unwanted noise is generated by multiple sources or the positions of the sources are not known in advance. The performance of multiple reference feedforward systems has been investigated in the last decades regarding the attainable suppression, convergence speed, and computational burden. In the meantime, many applications have been published proving the efficacy of the approach. Several experiments show that in reverberating enclosures greater suppression can be obtained if the number of reference signals exceeds the number of noise sources. This paper provides the analysis of such control systems in the case of broadband excitation. It is proven that the application of extra reference signals shortens non-causal decay in the inverse of the reference path, enabling higher suppression, compared to the case where the number of the reference signals and noise sources are equal. The paper introduces the motivating experimental examples explained by the theoretical results and simulations.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110956"},"PeriodicalIF":3.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687370","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