Acoustical Physics最新文献_第2页

Chuprov Invariant for Vector–Scalar Fields of Multipole Sources in Shallow Water 浅水多极源矢量-标量场的丘普罗夫不变式

IF 0.9 4区物理与天体物理

Acoustical Physics Pub Date : 2024-09-18 DOI: 10.1134/S1063771024602073

G. N. Kuznetsov, A. N. Stepanov

{"title":"Chuprov Invariant for Vector–Scalar Fields of Multipole Sources in Shallow Water","authors":"G. N. Kuznetsov, A. N. Stepanov","doi":"10.1134/S1063771024602073","DOIUrl":"10.1134/S1063771024602073","url":null,"abstract":"<div><p>A computational and theoretical study of the properties of the well-known Chuprov waveguide invariant (CI) was carried out in a plane-parallel Pekeris waveguide. In contrast to earlier works, in which predominantly omnidirectional (monopole) sources were used as a source and sound pressure fields (scalar fields) were studied, in this work not only scalar, but also vector fields formed in the waveguide by directional-combined multipole sources with directivity in both horizontal and vertical planes are investigated. A differential equation has been obtained that makes it possible to fairly accurately calculate the CI values under different conditions of signal propagation and different depths of the sources and receivers. This makes it possible, in a simpler way than “total computer simulation,” to predict the invariance (stability) of the CI when both the hydrophysical conditions in the waveguide and the geometry of the experiment are varied. It is shown that the directivity of sources in the horizontal plane has virtually no effect on the properties of the CI, and the directivity in the vertical plane leads to a shift in the fan structure of the signal amplitude fields, but has little effect on the CI values. The properties of the fan structure change similarly when using vertical projections of the vibrational velocity vector: despite the fact that another analytical relation different from scalar fields is used to calculate the CI, the CI value is close to (1) at all frequencies and distances, except for those at which new modes or dislocations appear. At these frequencies and in these zones, alternating emissions with different signs and magnitudes occur. It is concluded that the stability of the CI allows the application of signal processing algorithms developed for scalar fields and nondirectional sources to vector–scalar fields generated, including with the use of directional sources.</p></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Recognition and Classification of Noise Signals by Dolphins (Tursiops truncatus) Under Conditions of Noise Interference and Spatial Uncertainty of Their Simultaneous Presentation 海豚（Tursiops truncatus）在噪声干扰和同时呈现噪声信号的空间不确定性条件下对噪声信号的识别和分类

IF 0.9 4区物理与天体物理

Acoustical Physics Pub Date : 2024-09-18 DOI: 10.1134/S1063771023600298

A. V. Akhi

{"title":"Recognition and Classification of Noise Signals by Dolphins (Tursiops truncatus) Under Conditions of Noise Interference and Spatial Uncertainty of Their Simultaneous Presentation","authors":"A. V. Akhi","doi":"10.1134/S1063771023600298","DOIUrl":"10.1134/S1063771023600298","url":null,"abstract":"<div><p>The ability of the dolphin auditory system to recognize and classify noise signals according to certain invariant characteristics under the influence of noise interference and in conditions of spatial uncertainty of the simultaneous presentation of positive and negative signals was investigated. Bottlenose dolphins trained to differentiate such signals had to solve this problem in conditions simulating real sea conditions, when the perception of a useful noise signal occurs against a background of similar signals and against a noise interference background. First, noise signals were sequentially presented to the animal against a background of white masking noise. Subsequently, the dolphin had to identify a signal of a positive class from several simultaneously sounding sound sources. The animal’s performance was assessed at several specified noise interference levels. In this case, the actual noise interference was both white noise and simultaneously sounding negative signals. It has been shown that the efficiency and noise immunity of the dolphin’s auditory system depends on the degree of alternativeness of the spatial uncertainty of the simultaneous presentation of signals.</p></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Temperature Characteristics of Rayleigh Wave and Leaky Surface Acoustic Wave Propagating in Langasite and its Application in Temperature Sensor 传播于朗格斯蒂中的瑞利波和泄漏表面声波的温度特性及其在温度传感器中的应用

IF 0.9 4区物理与天体物理

Acoustical Physics Pub Date : 2024-09-18 DOI: 10.1134/S1063771022100049

Y. Yang, B. Peng, F. Huang, J. Zhu, Z. He, P. He, W. Zhang

引用次数: 0

Inclined Crack Quantification of Plate-Like Structures Based on Circular Sensor Array and Lamb Waves 基于环形传感器阵列和 Lamb 波的板状结构倾斜裂缝量化技术

IF 0.9 4区物理与天体物理

Acoustical Physics Pub Date : 2024-09-18 DOI: 10.1134/S1063771024602097

Z. Wang, Y. Yan, Z. Gao, B. Shi

引用次数: 0

On the Accuracy of Distance Estimates Based on Sound Signal Propagation Time on the Arctic Shelf 基于北极大陆架上声音信号传播时间的距离估计精度

IF 0.9 4区物理与天体物理

Acoustical Physics Pub Date : 2024-09-18 DOI: 10.1134/S1063771024602036

Yu. V. Nazarenko, D. D. Sidorov, V. G. Petnikov, S. V. Pisarev, A. A. Lunkov

引用次数: 0

A Vortex Sound Model for the Prediction of Near-Field Aeroacoustic Noise from a Generic Side Mirror 用于预测通用侧镜近场气声噪声的涡流声模型

IF 0.9 4区物理与天体物理

Acoustical Physics Pub Date : 2024-09-18 DOI: 10.1134/S1063771023600018

X. Gu, J. Du

{"title":"A Vortex Sound Model for the Prediction of Near-Field Aeroacoustic Noise from a Generic Side Mirror","authors":"X. Gu, J. Du","doi":"10.1134/S1063771023600018","DOIUrl":"10.1134/S1063771023600018","url":null,"abstract":"<p>A numerical model for investigating the aerodynamic sound generated by the interaction between flow and bluff body is developed, and then applied to the computation of near-field noise induced by the turbulent airflow passing through a generic side mirror. The flow field is simulated by employing the viscous vortex method. Then the sound sources within the computational domain are extracted from the simulated results with a vortex sound equation. The sound waves, sum of radiated sound and scattered sound, are determined using a time-domain boundary element method combined with the convolution quadrature method for improving the stability of the time marching algorithm. Further, the fast multipole method is adopted to enhance the computational efficiency. The computed pressure coefficients and surface pressure fluctuations match the measurements and simulations very well, and the obtained spectra of near-field aerodynamic sound are also close to the measured results. The comparisons of computed results of two additional cases with the previous studies demonstrate convincingly that the proposed model can effectively predict the flow-induced near-field noise<i>.</i></p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Optimization of Dissipative Mufflers 消声消声器的优化

IF 0.9 4区物理与天体物理

Acoustical Physics Pub Date : 2024-09-18 DOI: 10.1134/S1063771024601730

A. I. Komkin, A. I. Bykov, L. S. Karnaukhova

引用次数: 0

Bandgap Mechanism of Phonon Crystals Coupled to Acoustic Black Holes 与声波黑洞耦合的声子晶体的带隙机制

IF 0.9 4区物理与天体物理

Acoustical Physics Pub Date : 2024-09-18 DOI: 10.1134/S106377102360078X

Z. Boqiang, Z. Qiangqiang, H. Qingwen, F. Tianpei, X. Gao, J. Xin

{"title":"Bandgap Mechanism of Phonon Crystals Coupled to Acoustic Black Holes","authors":"Z. Boqiang, Z. Qiangqiang, H. Qingwen, F. Tianpei, X. Gao, J. Xin","doi":"10.1134/S106377102360078X","DOIUrl":"10.1134/S106377102360078X","url":null,"abstract":"<p>In this study, phonon crystal structures embedded in acoustic black holes are discussed. The low-frequency band gap is widened by exploiting the low-frequency, broadband and multimode properties of the acoustic black hole. The energy band properties of the acoustic crystal structure embedded in an acoustic black hole are calculated by means of a finite element method. The mechanism of band gap generation is investigated. The vibration transfer characteristics of finite period structures are analyzed. The influence of the structural parameters of the acoustic black hole is analyzed. The results show that the acoustic crystal structure embedded in an acoustic black hole has multiple band gaps in the 500 Hz band and the band gap coverage is increased to 45.18%. The starting bandgap is 16.10% lower than before embedding in the acoustic black hole and the width of the first bandgap expands to 173.03% of that before embedding in the acoustic black hole. The onset and termination frequencies of the first band gap are mainly determined by the vibrational modes of the scatterer and the acoustic black hole structure. The vibrational transfer of the finite period structure is analyzed and shows good damping characteristics in the bandgap interval. Finally, vibration experiments verify the vibration damping effect of the proposed coupled acoustic black hole phononic crystal, and the relevant findings of this paper can be used in the vibration damping design of plate structures, enriching the experience of research related to acoustic black holes<i>.</i></p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Erratum to: Study on Impact of Variable Thermal Conductivity or Laser Pulse on Reflected Elastic Waves in a Semiconductor Medium 勘误：关于半导体介质中不同导热系数或激光脉冲对反射弹性波影响的研究

IF 0.9 4区物理与天体物理

Acoustical Physics Pub Date : 2024-09-18 DOI: 10.1134/S1063771024030011

Ihtisham Ullah, Maaz Ali Khan, S. M. Abo-Dahab, Adiya Dar, M. Rafiq Sial, Mohamed Daher Albalwi, Adnan Jahangir

引用次数: 0

Real-Time Detection and Synergistic Effect of Acoustic Cavitation Excited by Pulse HIFU Based on Self-Sensing Ultrasound 基于自感超声的脉冲 HIFU 激发声空化的实时检测和协同效应

IF 0.9 4区物理与天体物理

Acoustical Physics Pub Date : 2024-09-18 DOI: 10.1134/S1063771024601389

Y. Xu, C. Liu, Q. Cao, Y. Li

{"title":"Real-Time Detection and Synergistic Effect of Acoustic Cavitation Excited by Pulse HIFU Based on Self-Sensing Ultrasound","authors":"Y. Xu, C. Liu, Q. Cao, Y. Li","doi":"10.1134/S1063771024601389","DOIUrl":"10.1134/S1063771024601389","url":null,"abstract":"<p>High-intensity focused ultrasound (HIFU) is widely used in the treatment of benign and malignant tumors due to its advantages of noninvasiveness and high therapeutic efficiency. However, how to improve the efficiency of heat deposition in a short period of time is a key problem during HIFU thermal ablation. The acoustic cavitation excited by pulse HIFU has been proven to achieve HIFU efficiency enhancement. However, the real-time monitoring of acoustic cavitation is still an issue. In this study, a real-time detection method of acoustic cavitation is established based on self-sensing ultrasound, and the synergistic effect of acoustic cavitation excited by pulse HIFU is researched. The influences of the output power, pulse duration, irradiation depth on cavitation duration are respectively discussed by using the established cavitation detection method compared passive cavitation detection (PCD). The relationship between cavitation intensity and synergistic effect is discussed. The results have shown that the cavitation detection can real-time measure cavitation duration compared with PCD. In addition, during the cavitation detection of pulse HIFU, the synergistic effect of acoustic cavitation is obvious in HIFU ablation<i>.</i></p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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