Acoustical Physics最新文献_第6页

Elastic Losses and Dispersion in a Dense and Porous Ferroelectrically “Hard” Piezoceramics 致密多孔铁电“硬”压电陶瓷的弹性损耗和色散

IF 1.2 4区物理与天体物理

Acoustical Physics Pub Date : 2026-04-06 DOI: 10.1134/S1063771025600287

I. A. Shvetsov, N. A. Shvetsova, E. I. Petrova, M. A. Lugovaya, M. G. Konstantinova, N. A. Kolpacheva, A. N. Rybyanets

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Reflection of a Sound Wave by an Array of Semi-Infinite Impedance Screens 半无限阻抗屏阵列对声波的反射

IF 1.2 4区物理与天体物理

Acoustical Physics Pub Date : 2026-04-06 DOI: 10.1134/S1063771025600226

N. G. Kanev, A. R. Dolger

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Vector Laplacian in Spherical Coordinates: On One Uncorrected Misprint in “Fluid Mechanics” by L.D. Landau and E.M. Lifshitz (A Comment on the Article by P.V. Lebedev-Stepanov and O.V. Rudenko “Acoustic Microfluidics: Capillary Waves and Vortex Currents in a Spherical Fluid Drop,” Acoust. Phys. 62 (4), 414 (2016)) 球坐标下的矢量拉普拉斯：L.D. Landau和E.M. Lifshitz在《流体力学》中一个未纠正的印刷错误(对P.V. lebedevv - stepanov和O.V. Rudenko的文章“声学微流体：球形液滴中的毛细波和涡流”的评论，声学学报。物理学报，62 (4),414 （2016）

IF 1.2 4区物理与天体物理

Acoustical Physics Pub Date : 2025-11-21 DOI: 10.1134/S1063771025600706

P. V. Lebedev-Stepanov

{"title":"Vector Laplacian in Spherical Coordinates: On One Uncorrected Misprint in “Fluid Mechanics” by L.D. Landau and E.M. Lifshitz (A Comment on the Article by P.V. Lebedev-Stepanov and O.V. Rudenko “Acoustic Microfluidics: Capillary Waves and Vortex Currents in a Spherical Fluid Drop,” Acoust. Phys. 62 (4), 414 (2016))","authors":"P. V. Lebedev-Stepanov","doi":"10.1134/S1063771025600706","DOIUrl":"10.1134/S1063771025600706","url":null,"abstract":"<div>Acoustic physics problems describing the propagation of acoustic effects or associated flows rely on hydroaeromechanic equations, in particular, on Navier–Stokes equations containing the vector Laplacian of the velocity of a liquid or gaseous medium. One of the most commonly used coordinate systems is spherical. The article discusses a fundamental misprint in “Fluid Mechanics” by L.D. Landau and E.M. Lifshitz (Course of Theoretical Physics, Vol. VI), which has been replicated up to the sixth revised Russian edition of 2021 and which also made it into the English version of the course published by Pergamon. It concerns the Navier–Stokes equation in spherical coordinates (15.21), which describes the r-component of the vector Laplacian. The typo migrates to secondary publications and can complicate theoretical studies related to application of the Navier–Stokes equations, which the author of this note has personally encountered. The r-component of the vector Laplacian is derived in detail from general principles to show what the corresponding Navier–Stokes equation should look like and that the typo is indeed present. In addition, more compact equivalent forms of the Navier–Stokes equations in spherical coordinates are proposed.</div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"71 4","pages":"669 - 673"},"PeriodicalIF":1.2,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561573","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

Modeling of the Absorption Coefficient and Calculation of Sound Velocity in Suspensions Using the Urick Equation 基于Urick方程的悬架吸声系数建模及声速计算

IF 1.2 4区物理与天体物理

Acoustical Physics Pub Date : 2025-11-21 DOI: 10.1134/S106377102560007X

B. B. Damdinov, Ch. M. Mytipov, M. I. Pryazhnikov, A. V. Minakov

引用次数: 0

Anti-Plane Shear Horizontal Wave Propagation in a Dry Sandy Plate: A Detailed Investigation under Various Boundary Conditions 干沙板中反平面剪切水平波传播：不同边界条件下的详细研究

IF 1.2 4区物理与天体物理

Acoustical Physics Pub Date : 2025-11-21 DOI: 10.1134/S1063771025600251

V. Sharma, J. Singh, S. Deep

{"title":"Anti-Plane Shear Horizontal Wave Propagation in a Dry Sandy Plate: A Detailed Investigation under Various Boundary Conditions","authors":"V. Sharma, J. Singh, S. Deep","doi":"10.1134/S1063771025600251","DOIUrl":"10.1134/S1063771025600251","url":null,"abstract":"Anti-plane shear horizontal (SH) waves in plates plays a crucial role as guided waves in non-destructive testing techniques, biosensing devices and structural health monitoring. This study thoroughly investigates the characteristics of SH waves in an infinitely extended Weiskopf sandy material plate with finite thickness. Using an analytical approach similar to the method of separation of variables, dispersion relations are derived for three types of boundary conditions: stress-free, rigidly fixed, and mixed. For stress-free and rigidly fixed boundaries, the resulting wave motions are classified into symmetric and skew-symmetric modes. These distinct wave modes, however, do not occur under mixed boundary conditions. Notably, the dispersion relation remains invariant under mixed boundary conditions even when the stress-free and rigidly fixed surfaces are interchanged. The group velocity of SH waves is also derived analytically. Dispersion curves are plotted to illustrate various symmetric and skew-symmetric modes, with particular emphasis on the effects of the sandiness parameter and plate thickness on wave dispersion behavior.","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"71 4","pages":"559 - 568"},"PeriodicalIF":1.2,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561556","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

Ultrasound Power Doppler Imaging Using Regional-Lag Signed Delay Multiply and Sum Beamformer 基于区域滞后签名延迟乘和波束形成器的超声功率多普勒成像

IF 1.2 4区物理与天体物理

Acoustical Physics Pub Date : 2025-11-21 DOI: 10.1134/S1063771025600081

B. Wang, X. Yang, S. Zhang, X. Yan

{"title":"Ultrasound Power Doppler Imaging Using Regional-Lag Signed Delay Multiply and Sum Beamformer","authors":"B. Wang, X. Yang, S. Zhang, X. Yan","doi":"10.1134/S1063771025600081","DOIUrl":"10.1134/S1063771025600081","url":null,"abstract":"Ultrasound power Doppler imaging serves as an essential diagnostic modality for blood flow visualization in clinical practice, demonstrating superior sensitivity relative to conventional color Doppler imaging. Despite its advantages, further enhancement in imaging quality remains imperative to achieve more precise clinical diagnoses. This study introduces an innovative power Doppler imaging technique incorporating a regional-lag signed delay multiply and sum (rsDMAS) beamformer to improve contrast performance. The proposed rsDMAS algorithm overcomes existing technical limitations through dynamic optimization of the maximum lag parameter for coherence estimation, effectively amplifying blood flow signals while maintaining the integrity of weaker vascular signals. Furthermore, the implementation of a clutter filter on aperture-compounded signals successfully addresses phase distortion artifacts that would otherwise compromise imaging quality. Comprehensive validation through both simulation and in vivo experiments revealed substantial performance improvements: contrast ratio (CR) enhancements of 39 and 10.7%, contrast-to-noise ratio (CNR) improvements of 9 and 55.8%, and signal-to-noise ratio (SNR) gains of 40 and 7.8% compared to frame multiply and sum (FMAS) and delay multiply and sum (DMAS) methods, respectively. The developed technique demonstrates robust suppression of thermal noise and acoustic clutter, ultimately yielding significantly enhanced blood flow imaging capabilities for clinical applications.","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"71 4","pages":"638 - 647"},"PeriodicalIF":1.2,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561557","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

Comparison of Ray-Tracing and Diffraction Methods for Correcting Aberrations in Transcranial Focusing of Ultrasound Field 射线示踪与衍射校正经颅超声场聚焦像差的比较

IF 1.2 4区物理与天体物理

Acoustical Physics Pub Date : 2025-11-21 DOI: 10.1134/S1063771024602462

O. V. Solontsov, P. B. Rosnitskiy, D. D. Chupova, L. R. Gavrilov, V. E. Sinitsyn, E. A. Mershina, O. A. Sapozhnikov, V. A. Khokhlova

{"title":"Comparison of Ray-Tracing and Diffraction Methods for Correcting Aberrations in Transcranial Focusing of Ultrasound Field","authors":"O. V. Solontsov, P. B. Rosnitskiy, D. D. Chupova, L. R. Gavrilov, V. E. Sinitsyn, E. A. Mershina, O. A. Sapozhnikov, V. A. Khokhlova","doi":"10.1134/S1063771024602462","DOIUrl":"10.1134/S1063771024602462","url":null,"abstract":"<div>The study theoretically evaluates the capabilities of ray-tracing and diffraction-based aberration-correction methods, which are used in noninvasive neurosurgery for focusing high-intensity ultrasound through the skull bones at various depths in the human brain. The analysis is based on using head computed tomography (CT) data of skulls with various geometric characteristics from an anonymized set of eight patients. The transducer is a mosaic 1 MHz phased array shaped like a spherical bowl with a radius of curvature and a diameter of 200 mm, and fully-populated, 256-element layout. In the ray-tracing method, aberrations were corrected by calculating the phase shift along the rays emanating from the target point to the centers of the elements. In the diffraction-based method, calculation of the Rayleigh integral was combined with a pseudospectral numerical method for solving the wave equation in an inhomogeneous medium, implemented in the k-Wave software package and used for aberration correction and ultrasound focusing simulations. It is shown that the strongest field distortions are observed for skulls with more pronounced variations in bone thickness. Compared with the ray-based method, the diffraction-based method provided higher focusing efficiency and enabled aberration correction at shallower depths in the brain.</div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"71 4","pages":"580 - 588"},"PeriodicalIF":1.2,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S1063771024602462.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Application of the Finite Element Method to Studying the Efficiency of Shielding Aviation Noise Sources 有限元方法在航空噪声源屏蔽效率研究中的应用

IF 1.2 4区物理与天体物理

Acoustical Physics Pub Date : 2025-11-21 DOI: 10.1134/S1063771025600652

S. L. Denisov, N. N. Ostrikov, V. I. Vorontsov

引用次数: 0

Numerical Modeling of Elastic Wave Phenomena by the Grid-Characteristic Method on Chimera Computational Meshes 嵌合体计算网格上弹性波动现象的网格特征法数值模拟

IF 1.2 4区物理与天体物理

Acoustical Physics Pub Date : 2025-11-21 DOI: 10.1134/S1063771024603194

A. V. Favorskaya, N. I. Khokhlov, A. A. Kozhemyachenko, I. B. Petrov

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Asymptotic Evaluation of Three-Dimensional Integrals with Singularities in Application to Wave Phenomema 三维奇异积分的渐近求值在波动现象中的应用