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Study of the Acoustic Perceptibility of Vehicles Moving at a Constant Speed
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2025-01-24 DOI: 10.1134/S1063771023600584
A. O. Subbotkin, G. N. Kuznetsov, E. V. Talachev, G. A. Romanenko, A. S. Tyurin
{"title":"Study of the Acoustic Perceptibility of Vehicles Moving at a Constant Speed","authors":"A. O. Subbotkin,&nbsp;G. N. Kuznetsov,&nbsp;E. V. Talachev,&nbsp;G. A. Romanenko,&nbsp;A. S. Tyurin","doi":"10.1134/S1063771023600584","DOIUrl":"10.1134/S1063771023600584","url":null,"abstract":"<p><b>Abstract</b><i>—</i>The article presents the results of an experiment on assessing subjective indicators of acoustic perceptibility by pedestrians (experts) of a vehicle approaching at a constant speed and some conclusions. Subjective indicators of perceptibility were defined as the distance between the vehicle and the expert, at the moment when the expert heard (recorded) the sound of an approaching car, as well as the time of the car’s approach to the expert at that moment. Subjective indicators of perceptibility are compared with the objective parameters of car noise measured in accordance with UN Regulation no. 138: the sound pressure level, its frequency response, and the sound level. The study is motivated by the problem of traffic safety of electrified vehicles with low noise, which include, in particular, electric cars and electric scooters. The article publishes the first results of a research paper devoted to increasing the perceptibility of low-noise vehicles for pedestrians without damaging the acoustic ecology of cities and suburbs.</p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 5","pages":"880 - 886"},"PeriodicalIF":0.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109010","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
Slit Shear Waves in a Quasi PT-Symmetric Piezoelectric Heterostructure Near the Mode Degeneracy Point
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2025-01-24 DOI: 10.1134/S1063771024601766
E. A. Vilkov, O. A. Byshevsky-Konopko, D. V. Kalyabin, S. A. Nikitov
{"title":"Slit Shear Waves in a Quasi PT-Symmetric Piezoelectric Heterostructure Near the Mode Degeneracy Point","authors":"E. A. Vilkov,&nbsp;O. A. Byshevsky-Konopko,&nbsp;D. V. Kalyabin,&nbsp;S. A. Nikitov","doi":"10.1134/S1063771024601766","DOIUrl":"10.1134/S1063771024601766","url":null,"abstract":"<p>The propagation of slit shear waves in a quasi-symmetric structure of piezoelectrics of the 4mm symmetry class has been theoretically studied. It has been shown that taking into account the unequal level of loss and gain in piezoelectrics results in either intersection, touching, or convergence of two modes at the point of their degeneracy (singular point) in the shear wave spectrum. It has been found that the intersection of the mode spectra occurs only in the case of equal loss and gain magnitudes (a <i>PT</i>-symmetric structure). Based on this, it is concluded that using the pattern of the spectra near a singular point, it is possible to determine the level of imbalance of gain and loss in piezoelectric waveguides. As in the case of a purely <i>PT</i>-symmetric structure, the frequency dependence of the amplitude at an exceptional point of a quasi <i>PT</i>-symmetric structure (with a rather small difference in loss and gain levels) exhibits a very narrow peak, which opens up the possibility of creating hypersensitive sensors based on them. Thus, it has been shown that even at unequal loss and gain levels in piezoelectrics (a quasi <i>PT</i>-symmetric structure), it is possible to obtain a structure with all the characteristics of a <i>PT</i>-symmetric structure.</p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 5","pages":"808 - 815"},"PeriodicalIF":0.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109094","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
Physical Modeling of the Hydroacoustic Field of a Marine Propeller
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2025-01-24 DOI: 10.1134/S1063771024601912
A. V. Stulenkov, V. V. Artelniy, P. I. Korotin, A. S. Suvorov, I. E. Gorbuntsov, M. S. Norkin, S. G. Zaitseva
{"title":"Physical Modeling of the Hydroacoustic Field of a Marine Propeller","authors":"A. V. Stulenkov,&nbsp;V. V. Artelniy,&nbsp;P. I. Korotin,&nbsp;A. S. Suvorov,&nbsp;I. E. Gorbuntsov,&nbsp;M. S. Norkin,&nbsp;S. G. Zaitseva","doi":"10.1134/S1063771024601912","DOIUrl":"10.1134/S1063771024601912","url":null,"abstract":"<div><p>The article presents a study of the acoustic field of the propeller, including at the resonance frequencies of its blades. The study is based on a computational and experimental approach with the combined use of numerical and experimental physical modeling. The article shows the importance of taking into account the elastic resonances of the propeller in the design, demonstrates the methods of physical and numerical modeling used, which provide high accuracy in determining the resonance frequencies of the blades in water and in air. Using the example of two propeller models made of different materials, the effect of the <i>Q</i>-factor on the levels and type of radiation spectrum is experimentally demonstrated.</p></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 5","pages":"872 - 879"},"PeriodicalIF":0.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109376","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
Physical Modeling of the Method of Coherent Probing of Low-Contrast Bottom Layers in a Laboratory Tank 实验室水槽中低对比度底层相干探测方法的物理建模
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-11-27 DOI: 10.1134/S1063771024601821
V. I. Kalinina, P. N. Vyugin, I. A. Kapustin
{"title":"Physical Modeling of the Method of Coherent Probing of Low-Contrast Bottom Layers in a Laboratory Tank","authors":"V. I. Kalinina,&nbsp;P. N. Vyugin,&nbsp;I. A. Kapustin","doi":"10.1134/S1063771024601821","DOIUrl":"10.1134/S1063771024601821","url":null,"abstract":"<div><p>Under laboratory conditions, experimental verification of the developed algorithms for reconstructing low-contrast bottom layers during their coherent sensing was carried out. The algorithms use parametric models for generating signals reflected from a layered half-space in the form of a set of elastic layers. To solve the problem at the Department of Acoustics of Nizhny Novgorod State University, an experimental setup was created for the formation, emission, and reception of high-resolution sound pulses reflected from a set of elastic layers placed in a tank of water. The experimental study showed the possibility of using the coherent sensing method for layered media with relatively similar acoustic parameters. Processing of the data obtained resulted in good agreement between the developed computational model of probing acoustic pulse signals reflected from a layered bottom and the physical modeling data. It is shown that analysis of the plane of the geoacoustic parameters of a specific problem using the developed numerical model makes it possible to assess the capabilities of a promising method for coherent diagnostics of low-contrast bottom layers.</p></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 4","pages":"659 - 669"},"PeriodicalIF":0.9,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737327","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 the Metal Structure and Plastic Deformation on the Nonlinear Acoustic Parameter 金属结构和塑性变形对非线性声学参数的影响
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-11-27 DOI: 10.1134/S1063771024601468
A. V. Vanyagin, A. V. Ilyakhinskii, V. M. Rodyushkin
{"title":"Influence of the Metal Structure and Plastic Deformation on the Nonlinear Acoustic Parameter","authors":"A. V. Vanyagin,&nbsp;A. V. Ilyakhinskii,&nbsp;V. M. Rodyushkin","doi":"10.1134/S1063771024601468","DOIUrl":"10.1134/S1063771024601468","url":null,"abstract":"<p>A practical task of testing samples of various metals using the principles of nonlinear acoustics is being solved. A surface acoustic wave (surfactant), whose propagation process, due to nonlinear effects, is accompanied by generation of a wave of doubled frequency, was used for testing. An experimental device is used to monitor the structural state of a metal sample by recording a change in the nonlinear acoustic parameter (NAP). To excite surfactants, a wedge transducer with a resonance frequency of 1 MHz was used. The transmitted wave was recorded with a wedge transducer with a resonance frequency of 2 MHz. It has been shown that the NAP for the tested materials in the initial state has different values not only for materials belonging to different classes, but also for materials belonging to the same structural class and having different chemical compositions (12Kh17G9AN4 and 12Kh18N10Т). A plastic deformation by 2% does not lead to a NAP change for the AMg6 alloy and 12Kh17G9AN4, 20Kh13N4G9, and 10KhSND steels. The NAP change by 2% as a result of a plastic deformation for the 12Kh18N10T and 08Kh17N4M3 stainless steels is caused by a change in their phase compositions associated with the martensitic transformation. The presented data on the change in the NAP from early stages of the elastoplastic deformation to a predestruction for AMg6 and 10KhSND steels demonstrate the possibility of using it as a prognostic criterion for the limiting state of the material.</p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 4","pages":"608 - 612"},"PeriodicalIF":0.9,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S1063771024601468.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737330","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
Sound Waves in a Medium with Resonance Inclusions of a Dipole Type 带有偶极型共振内含物的介质中的声波
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-11-27 DOI: 10.1134/S106377102460181X
N. G. Kanev, M. A. Mironov
{"title":"Sound Waves in a Medium with Resonance Inclusions of a Dipole Type","authors":"N. G. Kanev,&nbsp;M. A. Mironov","doi":"10.1134/S106377102460181X","DOIUrl":"10.1134/S106377102460181X","url":null,"abstract":"<div><p>An elastic medium with inclusions that are small compared to the sound wavelength and differ in density is considered. If the inclusions are resonators that respond equally to the influence of waves coming from different directions, then the effective density of the medium in a certain frequency band becomes negative. If the direction of the dipole moment of the resonators is fixed, then the medium with inclusions has an anisotropic effective density. The Helmholtz equation for such a medium was obtained, and the field of a point source was studied.</p></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 4","pages":"602 - 607"},"PeriodicalIF":0.9,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737331","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
Reverse Design of Absorption Performance for Typical Underwater Acoustic Coatings Based on Neural Network 基于神经网络的典型水下声学涂层吸收性能反向设计
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-11-27 DOI: 10.1134/S1063771024601511
R. Zhu, H. Hu, K. Wang, H. Chen
{"title":"Reverse Design of Absorption Performance for Typical Underwater Acoustic Coatings Based on Neural Network","authors":"R. Zhu,&nbsp;H. Hu,&nbsp;K. Wang,&nbsp;H. Chen","doi":"10.1134/S1063771024601511","DOIUrl":"10.1134/S1063771024601511","url":null,"abstract":"<p>This paper presents a method for rapidly reverse designing the absorption performance of acoustic coatings, utilizing the principles of a concatenated deep neural network. It enables the swift acquisition of effective input parameters. By cascading a reverse neural network with pre-trained forward neural networks, a concatenated neural network is obtained. This network maps the absorption spectrum response to structural and material parameters, thereby resolving the nonuniqueness issue in traditional reverse design. The paper describes the detailed process of reverse designing the absorption performance of acoustic coatings and validates the correctness of the reverse design using finite element methods. A comparative analysis investigates the impact of different loss functions on result accuracy. The findings demonstrate that the proposed modified loss function algorithm significantly enhances precision compared to traditional direct reverse design. This advancement allows for the customization of acoustic coatings with specific acoustic properties, providing technical groundwork for vibration and noise reduction in underwater vehicles.</p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 4","pages":"745 - 758"},"PeriodicalIF":0.9,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737335","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
Estimation of the Distance to a Local Inhomogeneity on an Acoustic Path in Shallow Water in the Presence of Background Disturbances 存在背景干扰时浅水区声学路径上局部不均匀性的距离估计
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-11-27 DOI: 10.1134/S1063771024602231
A. A. Lunkov, M. A. Shermeneva
{"title":"Estimation of the Distance to a Local Inhomogeneity on an Acoustic Path in Shallow Water in the Presence of Background Disturbances","authors":"A. A. Lunkov,&nbsp;M. A. Shermeneva","doi":"10.1134/S1063771024602231","DOIUrl":"10.1134/S1063771024602231","url":null,"abstract":"<div><p>We consider the problem of estimating the position of a local inhomogeneity on a stationary acoustic path between a single sound source and vertical receiving array in a shallow water waveguide in the presence of background disturbances. A local bottom rise and a soliton-like internal wave are chosen as model inhomogeneities. It is proposed to determine the distance from the source to the inhomogeneity by cepstral analysis of the amplitude of the first waveguide mode isolated on the array, with preliminary deformation of the frequency axis. Numerical modeling is used to study the stability of this approach in the presence of several local inhomogeneities or additional disturbances: bottom slope, background internal waves, wind waves, and bottom irregularities. Estimates of the signal-to-noise ratio required to implement the approach are pro-vided.</p></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 4","pages":"683 - 695"},"PeriodicalIF":0.9,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736844","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
Adjustable Acoustic Delay Line as a Phase Shifter 作为移相器的可调式声学延迟线
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-11-27 DOI: 10.1134/S1063771024601845
B. D. Zaitsev, I. A. Borodina, A. A. Teplykh, A. P. Semyonov
{"title":"Adjustable Acoustic Delay Line as a Phase Shifter","authors":"B. D. Zaitsev,&nbsp;I. A. Borodina,&nbsp;A. A. Teplykh,&nbsp;A. P. Semyonov","doi":"10.1134/S1063771024601845","DOIUrl":"10.1134/S1063771024601845","url":null,"abstract":"<p>An acoustic delay line consisting of two <i>Y</i>–<i>X</i>-cut lithium niobate plates 0.2 mm thick placed on top of each other was experimentally investigated. An interdigital transducer is located at the edge of each plate. An rf voltage (pulsed or continuous-wave) is fed to one transducer, which excites a piezoelectrically active acoustic wave with transverse–horizontal polarization propagating in the first plate. The electric field of this wave penetrates the second plate to excite an acoustic wave therein, which is converted into an electrical signal using the second interdigital transducer. The phase and delay time of the output signal can be changed by varying the distance between the transducers by shifting one plate relative to the other.</p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 4","pages":"613 - 618"},"PeriodicalIF":0.9,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737332","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
Variability of the Cavitation Threshold of Seawater under Natural Conditions 自然条件下海水空化阈值的可变性
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-11-27 DOI: 10.1134/S1063771024601419
N. P. Melnikov
{"title":"Variability of the Cavitation Threshold of Seawater under Natural Conditions","authors":"N. P. Melnikov","doi":"10.1134/S1063771024601419","DOIUrl":"10.1134/S1063771024601419","url":null,"abstract":"<div><p>The results of measuring cavitation thresholds and some hydrological and hydrochemical parameters of seawater in various areas of the World Ocean are presented and discussed. The stable temporal variability of the cavitation thresholds on time scales of several days is shown. The daily, semidaily, and other periodicities of changes in magnitude of cavitation thresholds are revealed.</p></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 4","pages":"696 - 704"},"PeriodicalIF":0.9,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736845","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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