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Local Method for Separating Sound and Pseudosound Pressure Fluctuations 分离声压和伪声压波动的局部方法
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-02-28 DOI: 10.1134/S1063771023600390
O. P. Bychkov, G. A. Faranosov
{"title":"Local Method for Separating Sound and Pseudosound Pressure Fluctuations","authors":"O. P. Bychkov,&nbsp;G. A. Faranosov","doi":"10.1134/S1063771023600390","DOIUrl":"10.1134/S1063771023600390","url":null,"abstract":"<p>A new method for separating acoustic and pseudosound pressure fluctuations is proposed, based on analysis of signals at a pair of closely located points, so that the total size of the measurement zone is much smaller than the correlation scale of pseudosound perturbations. It is suggested that hydrodynamic fluctuations propagate at a velocity significantly lower than the sound velocity and obey the “frozen-in” perturbation model, which makes it possible, in real time or during data postprocessing, to convert the spatial derivative of the signal into a temporal derivative, which, after time integration, yields an estimate for pseudosound perturbations at the measurement point. A theoretical model of the approach and test results using model examples and numerical simulation data are presented.</p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140009771","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
Precision Measurement of the Group Velocity of Ultrasound in Samples with Millimeter Thickness 精确测量毫米厚度样品中的超声波群速度
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-02-28 DOI: 10.1134/S1063771023600729
D. I. Makalkin, A. A. Karabutov, E. V. Savateeva
{"title":"Precision Measurement of the Group Velocity of Ultrasound in Samples with Millimeter Thickness","authors":"D. I. Makalkin,&nbsp;A. A. Karabutov,&nbsp;E. V. Savateeva","doi":"10.1134/S1063771023600729","DOIUrl":"10.1134/S1063771023600729","url":null,"abstract":"<p>A methodology is proposed for high-precision local measurement of the group velocity of longitudinal waves in solid samples with millimeter thickness. Achievement of the required accuracy involves laser thermo-optical excitation of submicrosecond ultrasonic video pulses and ultrawideband piezoelectric recording of acoustic signals reflected from the test sample. Plane-parallel samples made of duralumin, quartz, and steel with a thickness of 2–6 mm are studied. To achieve the required accuracy in measuring the group velocity of ultrasound, the signal shape is mathematically processed with compensation for diffraction of the ultrasonic beam as it propagates through the sample. The possibility of ensuring the uncertainty in measuring the group velocity of ultrasound in the 1–15 MHz frequency range at a level of 0.1% in samples with millimeter thickness is demonstrated.</p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140009953","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
Influence of Multiple Factors on Underwater Semi-Active Sound Absorption of 2-1-3 Piezoelectric Composite and Root Cause Analysis 多种因素对 2-1-3 压电复合材料水下半主动吸声的影响及原因分析
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-02-28 DOI: 10.1134/S1063771022600607
Y. Sun, B. Hua
{"title":"Influence of Multiple Factors on Underwater Semi-Active Sound Absorption of 2-1-3 Piezoelectric Composite and Root Cause Analysis","authors":"Y. Sun,&nbsp;B. Hua","doi":"10.1134/S1063771022600607","DOIUrl":"10.1134/S1063771022600607","url":null,"abstract":"<p>2-1-3 piezoelectric composite is advantageous for its high piezoelectricity, mechanical stability and ease of preparation. Applying piezoelectric shunt damping technology in underwater semi-active sound absorption increases the adjustability of sound absorption performance. This paper analyzes the underwater semi-active sound absorption performance of 2-1-3 composite. The theoretical model and finite element model of 2-1-3 composite are established and the sound absorption coefficient of the composite coating is deduced based on transfer matrix and Mason equivalent circuit theory. The effects of the volume fraction of PZT-5H phase μ, the aspect ratio α and the shunt circuit on the sound absorption coefficient are studied and the root causes are analyzed. The results show that μ and α can affect the peak frequency, bandwidth and the range between open-circuit and short-circuit peak frequencies by changing the longitudinal wave velocity, mechanical loss factor and electromechanical conversion coefficient of the composite. Shunt circuits can adjust peak frequency and bandwidth by changing the elastic constant component <i>c</i><sub>33</sub> and mechanical loss factor of the composite. The conclusions of this study have value as reference for the design of underwater semi-active sound-absorbing material in various application scenarios<i>.</i></p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140009766","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
Thermal Interference When Recording Turbulent Pressure Fluctuations on the Surface of a Floating Device 记录浮动装置表面湍流压力波动时的热干扰
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-02-28 DOI: 10.1134/S1063771023600997
E. B. Kudashev, L. R. Yablonik
{"title":"Thermal Interference When Recording Turbulent Pressure Fluctuations on the Surface of a Floating Device","authors":"E. B. Kudashev,&nbsp;L. R. Yablonik","doi":"10.1134/S1063771023600997","DOIUrl":"10.1134/S1063771023600997","url":null,"abstract":"<p>Thermal interference is studied when recording turbulent pressure fluctuations on the surface of a floating device at specified experimental parameters of temperature stratification of an aquatic medium. The effect of distortion of the spectral levels of pressure fluctuations recorded by a sound receiver in the field of temperature inhomogeneities is studied using the example of measurements of turbulent pressure fluctuations in the boundary layer during the vertical ascent of a device from a specified depth. At moderate flow velocities exceeding 1–2 m/s, the temperature susceptibility of a piezoceramic receiver is shown to be decisively determined by its characteristic “thermal” frequency. The parameters of the threshold critical frequency, below which the temperature signal (thermal interference) prevails over the useful signal generated by pressure fluctuations, are determined. With respect to the receivers used in experiments on a floating device [7], the values of the threshold critical frequency are 130 and 215 Hz.</p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S1063771023600997.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140010088","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
Comparative Study of the Vibromechanical Characteristics of Compact Hydroacoustic Longitudinal-Bending Type Transducers with a Complex Radiating Shell Shape 具有复杂辐射壳体形状的紧凑型水声纵弯式传感器振动机械特性比较研究
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-02-28 DOI: 10.1134/S1063771023700641
A. K. Britenkov, M. S. Norkin, S. B. Zakharov, R. V. Travin, A. V. Stulenkov
{"title":"Comparative Study of the Vibromechanical Characteristics of Compact Hydroacoustic Longitudinal-Bending Type Transducers with a Complex Radiating Shell Shape","authors":"A. K. Britenkov,&nbsp;M. S. Norkin,&nbsp;S. B. Zakharov,&nbsp;R. V. Travin,&nbsp;A. V. Stulenkov","doi":"10.1134/S1063771023700641","DOIUrl":"10.1134/S1063771023700641","url":null,"abstract":"<div><p>The development of compact hydroacoustic low-frequency emitters with a high power density is fraught with difficulties due to conflicting requirements on the dimensions, efficiency, radiated power, operating bandwidth, and manufacturability. For compact emitters, the body dimensions limit the possibility of combining the resonances of the active element and mechanical oscillatory system, which makes their development difficult. A compact hydroacoustic low-frequency longitudinal-bending type transducer with a complexly shaped radiating surface, 3D LFR, designed for large-scale modeling and verification of theoretical calculations of such design, has relatively small dimensions and demonstrates high efficiency. The paper presents the results, obtained with laser vibrometry, of in-air measurements of the vibrational characteristics of two titanium bodies with different sizes and corrugation patterns. The proposed designs for the transduce with maximum overall dimensions of less than 100 mm and a weight of approximately 1 kg provide a voltage sensitivity of about 1 Pa m/V in the operating frequency band and the fundamental resonance in the 1–2 kHz range. 3D LFR has a high mechanical conversion coefficient and uses the added mass; it also has a number of other advantages over similar designs. It is shown that the 10–12% differences in the sizes of the two emitters and the geometry of the radiating shells (12 and 16 corrugation waves) lead to a difference in the resonance frequencies measured in air (4.0 and 3.5 kHz, respectively). At the same time, the emitter is larger and has a smaller spread of the mechanical conversion coefficient along the ridges and troughs of the body, as well as a denser distribution of the spectral components outside the fundamental frequency band.</p></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140009661","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
The Influence of Random Internal Waves on the Characteristics of a Horizontal Antenna in a Shallow Sea 浅海中随机内波对水平天线特性的影响
IF 0.8 4区 物理与天体物理
Acoustical Physics Pub Date : 2023-11-16 DOI: 10.1134/S1063771023600705
M. A. Raevskii, V. G. Burdukovskaya
{"title":"The Influence of Random Internal Waves on the Characteristics of a Horizontal Antenna in a Shallow Sea","authors":"M. A. Raevskii,&nbsp;V. G. Burdukovskaya","doi":"10.1134/S1063771023600705","DOIUrl":"10.1134/S1063771023600705","url":null,"abstract":"<div><div><p><b>Abstract</b>—The effect of random internal waves on the gain and pattern of a horizontal antenna array in a shallow sea has been investigated. An algorithm for calculating the correlation matrix of the point source field at the grating aperture is proposed. The antenna gain is analyzed for different spatial processing methods: the beam forming method, the optimal linear processing method, and the optimal quadratic processing method. The effect of internal waves on the directivity pattern is described by the dispersion of the angular response of the grating. Numerical simulation results are presented for a model summer-type waveguide and an exponential Brunt–Väisälä frequency profile. The empirical internal wave spectrum proposed earlier from the SWARM95 experiment is used. The dependences of the antenna array characteristics on the number of its elements, orientation with respect to the source, radiation frequency, and the acoustic characteristics of the bottom are analyzed.</p></div></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796936","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
Broadband Acoustic Field in a Shallow-Water Waveguide with an Inhomogeneous Bottom 底部非均匀浅水波导中的宽带声场
IF 0.8 4区 物理与天体物理
Acoustical Physics Pub Date : 2023-11-16 DOI: 10.1134/S1063771023600663
D. D. Sidorov, V. G. Petnikov, A. A. Lunkov
{"title":"Broadband Acoustic Field in a Shallow-Water Waveguide with an Inhomogeneous Bottom","authors":"D. D. Sidorov,&nbsp;V. G. Petnikov,&nbsp;A. A. Lunkov","doi":"10.1134/S1063771023600663","DOIUrl":"10.1134/S1063771023600663","url":null,"abstract":"<div><div><p><b>Abstract</b>—A broadband (35–1000 Hz) sound field formed by a point source in a shelf zone with inhomogeneous bottom sediment structure is studied using numerical modeling. The shelf depth is about 30 m and the maximum distance is 10 km. The transitional zone from the bottom with a sound speed of 1400 m/s to the bottom with a speed of 1600 m/s is chosen as the model inhomogeneity. The normal mode theory and wide-angle parabolic equations are used for sound field calculations. Numerical experiments show that the manifestation of horizontal refraction is noticeable at low frequencies (below 100 Hz). It leads to an increase in the amplitude of the low-frequency sound pulse propagating along the transitional zone by more than 10 dB in comparison with a similar waveguide with a homogeneous bottom. At frequencies above 100 Hz, the dominant effect is the mode coupling, causing the appearance of quasi-periodic oscillations of modal amplitude in the frequency domain. The conclusions from the simplified model are confirmed by calculations for the real structure of bottom sediments in the Kara Sea.</p></div></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796938","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
A Functional-Analytical Solution to the Ocean Tomography Problem Taking the Interaction of Modes into Account 考虑模态相互作用的海洋层析成像问题的泛函解析解
IF 0.8 4区 物理与天体物理
Acoustical Physics Pub Date : 2023-11-16 DOI: 10.1134/S1063771023600985
S. S. Zorin, A. S. Shurup
{"title":"A Functional-Analytical Solution to the Ocean Tomography Problem Taking the Interaction of Modes into Account","authors":"S. S. Zorin,&nbsp;A. S. Shurup","doi":"10.1134/S1063771023600985","DOIUrl":"10.1134/S1063771023600985","url":null,"abstract":"<div><div><p><b>Abstract</b>—A scheme of mode tomography of sound inhomogeneities and currents in the ocean, based on a mathematically rigorous functional-analytical algorithm, is considered. A distinctive feature of the proposed approach is the possibility of taking nonadiabatic mode propagation into account without involving iterative procedures. To simulate the scattering data, the solution of the coupled Lippmann–Schwinger equations is numerically implemented to describe the effects of multichannel mode scattering on inhomogeneities of sound sped and currents. Karhunen–Loeve functions are used to reconstruct three-dimensional scatterers, which allows one to reduce the number of unknowns when solving the inverse problem. The model results illustrate the high spatial resolution and the ability to achieve acceptable noise immunity of the discussed tomographic scheme when using a broadband sensing mode.</p></div></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796711","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
Determination of Ice Cover Parameters Using Seismoacoustic Noise 利用地震声噪声测定冰盖参数
IF 0.8 4区 物理与天体物理
Acoustical Physics Pub Date : 2023-11-16 DOI: 10.1134/S1063771023600341
D. A. Presnov, A. L. Sobisevich, A. S. Shurup
{"title":"Determination of Ice Cover Parameters Using Seismoacoustic Noise","authors":"D. A. Presnov,&nbsp;A. L. Sobisevich,&nbsp;A. S. Shurup","doi":"10.1134/S1063771023600341","DOIUrl":"10.1134/S1063771023600341","url":null,"abstract":"<div><div><p><b>Abstract</b>—A method for estimating ocean ice cover parameters (thickness, Young’s modulus, Poisson ratio, and density) that does not require the use of a source is proposed and tested on experimental data. To realize the approach, two single-channel seismic receivers located on the ice surface are required to record the vertical component of the oscillatory velocity of the seismic noise. The spectral-correlation analysis of the mutual correlation function of the noise registered by the receivers allows us to estimate the dispersion dependence of the group velocity of the bending-gravity wave propagating along the ice plate. The solution of the inverse problem is based on analyzing the variance of not only the group but also the phase velocity, which allows us to increase the amount of primary data. The obtained estimates of ice parameters are consistent with the results of independent observations carried out during the experiment, as well as with the estimates of other authors obtained for ice characteristics in the region of the experiment.</p></div></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796766","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
The Ability to Detect Sound Scattering Layers by Interferometric Side-Scan Sonar 干涉侧扫声纳探测声散射层的能力
IF 0.8 4区 物理与天体物理
Acoustical Physics Pub Date : 2023-11-16 DOI: 10.1134/S1063771023600389
V. I. Kaevitser, A. P. Krivtsov, I. V. Smolyaninov, A. V. Elbakidze
{"title":"The Ability to Detect Sound Scattering Layers by Interferometric Side-Scan Sonar","authors":"V. I. Kaevitser,&nbsp;A. P. Krivtsov,&nbsp;I. V. Smolyaninov,&nbsp;A. V. Elbakidze","doi":"10.1134/S1063771023600389","DOIUrl":"10.1134/S1063771023600389","url":null,"abstract":"<div><div><p><b>Abstract</b>—A method and algorithm for remote detection of sound-scattering layers in the seas and oceans using strip survey data of the bottom topography by interferometric side-scan sonar (ISSS) is considered. Based on mathematical modeling of phase-difference measurements of ISSS for multilayer scattering planes in seawater, we demonstrate the possibility of detecting sound-scattering layers and measuring their depths using the proposed algorithm. The accuracy of calculating the depths of sound-dispersing layers at a constant value of the sound velocity has been evaluated and the requirements to the ISSS have been determined to ensure the necessary accuracy of detection of individual layers located at different depths. The efficiency of the proposed method is demonstrated based on the example of processing by the developed algorithm of the experimental data obtained during bottom relief studies with an 85 kHz range ISSS.</p></div></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796991","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
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