- Name: Konstantin Bachinsky
Place of work: V.I.Il'ichev Pacific
Oceanological Institute, FEB RAS
Date of birth: 11.02.1983
Research title: Research of geometry
parameters of the experiments on
acoustic tomographic researches with
use group drifting radiohydroacoustic
One of the most perspective methods is the acoustic tomography of ocean allowing to carry out research and monitoring of dynamics and structure of water mass and bottom sediments in a mode of real time. For carrying out large-scale experimental researches at the marine station of the POI FEBRAS which is located on the cape of Schultz in the Posiet bay, it has been created the acoustic-hydrophysical equipped with modern devices of radiation, reception and processing of signals. For carrying out of this experiments the passing of complex phase manipulated signals using pseudo casuals M-sequences on stationary and quasi-stationary lines in shelf zones of the Sea of Japan is studied. Application of group drifting radiohydroacoustic buoys for registration of hydrophysical characteristics such as speed of a sound on lines of acoustic signals, superficial heave, internal waves, etc. makes it possible to obtain dependence properties of acoustic signals on parameters of environment on lines of propagating signals, effect ecological monitoring and estimate the seismic activity of the "ocean-continent" transitional zone. The point of work is actual and is caused that by carrying out tomografic researches it is necessary to have accurate estimations of the parameters setting geometry of spent experiments.
In the given work the technique of an estimation geometry parameters of experiments on realization of positioning drifting radiohydroacoustic buoys is developed, and also the program complex, allowing to calculate a relative mutual site hydrophones , their coordinates to make a binding to geographical coordinates. The unique geographical position of the research test site allows us to carry out work of not only research, but also methodological character. According to the measurements received in 2001-2006, it is created the database sound velocity, depth and character of bottom sediments at the hydroacoustic in the area of Cape of Schultz. In this connection there is a necessity of development of the software, allowing to project new tomographic schemes by computer modeling methods. Application of such software at a stage of planning the scheme of arrangement of the components of receiving and radiating systems in an interactive mode enables us to choose prospective location of the system modules on a map of research test site; to receive the values of depths according to the set coordinates; the data on the a sound velocity measured in this point during different periods of time; model calculation of sound propagation in beam approximation at the chosen arrangement in view of geomorphological features of the bottom.
K.V.Bachinskii, O.S.Gromasheva, V.A.Yukhnovskii. Research of geometry parameters of acoustic experiments on tomographic monitoring in shelf zones of the Sea of Japan. // Collection of papers 16 session of the RAS.2005. P. 256-260.
K.V.Bachinskii, O.S.Gromasheva, V.A.Yukhnovskii. Estimation of geometry parameters of experiments on positioning drifting radiohydroacoustic buoys. // Collection of papers 16 session of the RAS. 2005. V.2. Pp. 318-321.
- Name: Olga Bessonova
Place of work: Moscow State University, Department of Acoustics, Faculty of Physics
Date of birth: 07.08.1984
Research title: Focusing of high-power ultrasound beams and limiting values of parameters of shock waves in weakly and strongly absorptive media
Propagation of high intensity focused ultrasound beams of different geometry was studied numerically in water and in biological tissue based on the KZK nonlinear parabolic equation. Quantitative data for nonlinear corrections to focusing gains were obtained for various acoustic parameters in water and in tissue for piston and Gaussian sources of the same linear focusing gain. The results of modeling were compared with experimental data and found in excellent agreement. The developed simulation tools thus can be used for calibration of therapeutic ultrasound transducers and optimization of clinical protocols. It was shown that maximum enhancement of the peak positive pressure and intensity is stronger and is achieved at lower source amplitude for focused piston sources as compared to the Gaussian sources. Saturation levels at the focus for the piston source was shown to be lower and achieved at lower level of the source amplitude than for the Gaussian source. Spatial distributions of various acoustic parameters were obtained. It was shown that focal area of peak positive pressure is more localized and the focal area of peak negative pressure is much less localized in space and is noticeably displaced towards the source as compared with pressure distributions in the linear field. These effects are more pronounced for piston sources. The results of simulations performed in water can be used for prediction of nonlinear focusing gains and levels of saturation in tissue under appropriate choice of initial source amplitude.
V.A. Khokhlova, M.S. Basova, O.V. Bessonova, M.R. Bailey, and L.A. Crum. Nonlinear enhancement and saturation phenomena in focused ultrasound beams of various geometry. In: Proc. Int. Symp. "Topical Problems of Nonlinear Wave Physics", August 2-9, 2005, Nizhny Novgorod, pp. 44-45.
╬.V. Bessonova, V.└. Khokhlova. Effect of initial apodization of a harmonic signal over the surface of the focused source on nonlinearly-diffractive phenomena in HIFU beams. In: Proc. Symp. "Waves", 22 - 27 May, 2006, Zvenigorod, Russia.
╬.V. Bessonova, V.└. Khokhlova. Spatial distributions of various parameters of acoustic field in high intensity focused beams. In: Proc. XIII Session of the Russian Acoustical Society. 11-15 September, 2006, Taganrog, Russia, pp. 94-97 (in Russian).
- V.A. Khokhlova, O.V. Bessonova, M.S. Canney, Michael R. Bailey and L.A. Crum. Spatial distributions of acoustic parameters in high-intensity focused ultrasound fields. // J. Acoust. Soc. Am., 2006, Vol. 120, ╣ 5, Pt. 2 of 2, p.3194.
- Name: Anton Devichensky
Place of work: A.M. Prokhorov General Physics Institute of RAS
Date of birth: 07.03.1984
Research title: Subsurface residual stress testing in metals with laser pulse excited wideband acoustical waves
Two laser ultrasonic techniques for non-destructive testing of subsurface residual stress in metals are developed in the current work.
First technique is based on laser pulsed excitation of longitudinal acoustical waves pulses and wideband piezoelectric registration of back-scattered from medium heterogeneities acoustical signals. This method is intended for distributed in-depth biaxial residual stress testing. Theoretical background of this technique and numerical modeling, that confirms an accuracy of chosen method are developed. Hardened and grinded nickel and titan samples were investigated at assembled experimental setup.
Another technique is based on laser excitation of surface acoustical Rayleigh waves pulses and intended for in-plane distributed biaxial residual stress testing. New scheme of measurements and calculation algorithm allow one to reach high accuracy of time-of-flight measurements. Detailed analysis of technique's accuracies and opportunities is made in the current work. An influence of surface roughness on Rayleigh waves propagation is also investigated.
Obtained with both techniques results are in a good agreement with control data of mechanical destructive testing. This confirms an accuracy of chosen methods and their availability for application in practice. On the basis of made research work there were formulated principal requirements for laser ultrasonic device for non-destructive testing of residual stress in metals.
Devichensky A.U., Ivochkin A.U., Karabutov A.A., Pelivanov I.M., Merkulova N.S. Laser ultrasonic testing of subsurface residual stresses in metals, Proceedings of the ICONO/LAT 2005, May 11-15, 2005, St.Petersburg, Russia.
Devichensky A.Yu, Lomonosov A.M., Mikhalevich V.G., Lyamshev M.L., Zharinov S.E., Karabutov A.A. Laser ultrasonic Rayleigh waves testing of residual stress in metals, Proceedings of the XVIII Session of the Russian Acoustical Society, Septemberr 11-15, 2006, Taganrog, Russia.
Devichensky A.Yu, Lomonosov A.M., Mikhalevich V.G., Lyamshev M.L., Zharinov S.E., Karabutov A.A Laser ultrasonic Rayleigh wavestesting of residual stress in metals, Proceedings of the ILLA 2006, October 4-7, 2006, Smolyan, Bulgaria.
Alexander A. Karabutov, Anton Yu. Devichensky, Alexander Yu. Ivochkin, Michael L. Lyamshev, Ivan M. Pelivanov,Upendra Rohatgi , Manomohan Subudhi , Vladimir S. Solomatin Laser ultrasonic diagnostics of residual stress, Proceedings of the ICU International Congress on Ultrasonics, April 9-12, 2007, Vienna, Austria.
Devichensky A.Yu, Lomonosov A.M., Mikhalevich V.G., Lyamshev M.L., Zharinov S.E., Karabutov A.A Laser-excited Rayleigh waves for residual stress testing in metals, Proceedings of the ICU International Congress on Ultrasonics, April 9-12, 2007, Vienna, Austria.
- Name: Egor Dontsov
Place of work: Novosibirsk State University
Date of birth: 03.05.1987
Research title: The experimental research of gas hydrate formation behind a shock wave in the gas-liquid medium
Splitting, solution and hydrate formation behind the front of moderate shock wave were studied experimentally in water with carbon dioxide bubbles under different initial static pressures.
It is also shown that an increase in the static pressure in the medium with similar wave amplitudes increases the rate of hydrate formation and gas dissolving in liquid. The main mechanism for increasing the solution and hydrate formation rates with a rise of static pressure for the same relative wave amplitudes is reduction in the size of broken gas bubbles and interface enlargement. The rates of solution and hydrate formation for carbon dioxide behind the shock wave are close, and it is impossible to separate these processes in experiment.
It is shown that in water with carbon dioxide bubbles at temperature Ď = 1° Đ behind the front of shock waves with amplitudes DP/P0 > 10 at P0 = 0.5 MPa and
D P/P0 > 3 at P0 = 1.3 MPa, more than 90% of gas is partially converted into the gas-hydrate state and is partially dissolved in liquid during several milliseconds.
Qualitative correspondence between calculations by the kinetic model of gas hydration behind the shock wave in the gas-liquid medium and experimental data was obtained.
- Dontsov V.E., Chernov A.A., Dontsov E.V. The formation of gas hydrate in the shock wave// Abstract of 4 science school- conference "Pressing questions of Thermophysics and physics Hydrogasdynamics". 2006. Alushta. Ukraine. P. 39-41.
- Dontsov E.V., Neshpor N.A. The technology of gas hydrate formation of shock wave method in gas- liquid medium// Abstract of Russian students conference "Energy and energy saving". 2006. Tomsk. Russia. P. 411-419.
- Dontsov V.E., Chernov A.A., Dontsov E.V.. Shock waves and formation of carbon dioxide hydrate at an increased pressure in the gas-liquid medium// Thermophysics and Aeromechanics, 2007, Vol. 14, No. 1. P.23- 39.
- Name: Dmitrii Grigoriev
Place of work: N. N. Andreyev Acoustical Institute
Date of birth: 28.07.1980
Research title: Classification of amplitude-modulated signals by artificial neural
network from discharge pattern of the auditory units
The spike activity of the auditory units in two brainstem nuclei of the frog (cochlear nucleus and torus semicircularis) was recorded during the action of long amplitude-modulated tones. The sine waveform with different frequencies and different modulation depths had been used for this modulation. The firing of recorded single units was used as an input for two or (and) three layers artificial neural network. This neural network carried out two tasks: the detection of the amplitude modulation and the classification of the signals according to the modulation frequencies. According to our hypothesis, such neural network modeled the operations, provided by upper centers of the auditory system, which demonstrated the synaptic plasticity (Hebb's rule). The classification of the modulation frequencies was quite successful if the modulation depth was high enough and the number of frequencies was less than 10. However, for such successful classification the neural network should also receive an information about the initial phase of modulation. Without this information, the classification was quite moderate and could be provided only by three-layers neural network.
- Grigoriev D.Y., Bibikov. Use of neural networks for the analysis of pulse activity in auditory neurons // Works of 14-th International Conference on Neurocybernetics. Rostov on Don, "BIOS" RSU. V.1, p. 97-99, 2005.
- Bibikov N.G., Grigoriev D.Y. Classification of amplitude-modulation frequency by the auditory system units with the use of an artificial neural network. Annual Processing of the Russian Acoustical Society. Nonlenear Acoustics. 2006. V. 7. Trovant p..190-201.
- Bibikov of N.G., Grigoriev D.Y., Use of neural networks for definition of frequency of modulation of a signal on pulse activity ÝňÚţÝţÔ acoustical system of a frog. Acoustical Journal 2007. N. 5 (accepted).
- Grigorev D.J., Bibikov N.G.. Attempt of use three-layer neuronet for determination of modulation frequency of an acostical signal from firing activity of auditory brainsted units. Processing of the 13 Conference of Russian Acoustical Society. Nizhni Novgorod, September 2007.
- Name: Anton Khilko
Place of work: N.I. Lobachevsky State University of Nizhniy Novgorod
Date of birth: 10.11.1980
Research title: Investigation of peculiarities of tomographical images construction by means of high-frequency hydroacoustic fields in the oceanic environment.
Physical and mathematical models for the construction of high frequency tomographical images of inhomogeneities in the refractive, oceanic type layered waveguides were developed. It was shown, that the use of directed pulse signals matched to oceanic waveguide leads to increase the spatial resolution and sensitivity of tomographical observation system. Conditions of optimal excitation and reception of the directed pulse signals matched to waveguide in shallow water oceanic waveguides were formulated. Structure of pulse signals diffracted by impedance bodies, and surface inhomogeneities in layered waveguides was studied. Method of a high-frequency acoustic tomography of the shallow water oceanic waveguides, based on use of the directed pulse signals matched to oceanic waveguide was offered. The numerical imitation model of such method of observation in respect to oceanic shelf zones was developed. The possibility of diffracted by rigid sphere high-frequency pulse acoustic signals measurements was experimentally shown in shallow water waveguide.
Ivan P. Smirnov, Anton A. Khilko and Alexander I. Khil'ko. Modeling of high frequency acoustic fields, scattered by the targets in refractive waveguides // Radiophysics. 2004. V.47.N. 2. PP 11-128.
Irina R. Smirnova and Anton A. Khilko. Peculiarities of surface reverberation of high frequency directed pulse signals in shallow water / Proceedings of 10-th scientific school-seminar of academic Leonid M. Brekhovskikh and 14-th session of RAS. Moscow: GEOS. 2004. PP. 304-308.
Ivan P. Smirnov, Sergey N. Gurbatov and Anton A. Khilko. Scattering of the high-frequency acoustic field by impedance ellipsoid in shallow water oceanic waveguides / Proceedings of the International Conference "Underwater Acoustic Measurements: Technologies Results", Heraklion, Crete, Greece, 28th June - 1st, July, 2005.
- Name: Denis Rakov
Place of work: Institute of Monitoring of Climatic and Ecological Systems of the SB RAS. Tomsk, Russia
Date of birth: 12.07.1983
Research title: The Sound communication at long distances in the atmosphere. The directed microphones.
The problems of sound communication at long distances in the atmosphere are discussed. Sound communication at long distances in the atmosphere is transfer and reception of sound signals at distances longer than those of the usual human dialogue. This is provided by powerful directed sound sources or directed microphones.
On the basis of the research done, a directed microphone of parabolic type was designed providing a range of action up to 150-180 m at the external-noise level 20-25 dB. We developed a concept for designing directed microphones providing longer range of communication as compared with the models available at the market.
The application of soundproof blends to microphones allows us to narrow directivity diagrams of the aerial and to reduce the influence of noise coming from lateral directions.
The range of action of sound systems in the atmosphere can vary depending on meteorological conditions and underlying surface. Background noise and its interaction with the underlying surface were studied. An examination of the ground distribution of sound was also performed.
- D.S. Rakov Directional microphones. Proceedings scientific session of TUSUR. Tomsk. 2004. p. 30-32.
- N.P. Krasnenko, D.S. Rakov Characteristics of background noise in the atmosphere and their relation to environmental parameters. Proceedings scientific session of TUSUR. Tomsk. 2005. p. 31-33.
- N.P. Krasnenko, D.S. Rakov Speech audibility and intelligibility in surface sound broadcasting for long distances. Proceedings scientific session of TUSUR. Tomsk. 2005. p. 33-36.
- Krasnenko N.P., Rakov D.S. Characteristics of the background environmental noise in the atmosphere and their relationships with the parameters of the medium. XVI Session of the Russian Acoustical Society. Moscow, November 14-18, 2005, p. 364-367.
- Egorov A.N., Ivanova A. Yu., Krasnenko N.P., Rakov D.S., Fomichev A.A. Audibility and intelligibility of speech for ground-based broadcasting at long distances. XVI Session of the Russian Acoustical Society. Moscow, November 14-18, 2005, p. 372-375.
- N. Krasnenko, D.S. Rakov. Characteristics the background environmental noise in the atmosphere and their relationships with the parameters of the medium. Proceedings of the 6th European Conference on Noise Control "Euronoise 2006". CS 41-314, pp. 1-6, (CD), Tampere, Finland, 30 May - 1 June 2006.
- Name: Andrew Shurup
Place of work: Moscow State University, Faculty of Physics, Department of Acoustics
Date of birth: 30.10.1981.
Research title: Ocean mode tomography with low frequency noise implementation
For the realization of mode tomography scheme the new non orthogonal and overfull basis consisting of the intersecting stripes has been developed. It has been shown that the new stripe basis and the commonly used approaches to inhomogeneities representation (such as definition of hydrology distortion's in mesh nodes or in cells, compactly covered region under investigation) were the same in means of reconstruction quality, but the stripe basis essentially reduced the demands to the mathematical part of reconstruction procedure. The two-dimensional tomographic reconstruction of combined scalar-vector inhomogeneities in proposed scheme with stripe basis has been developed and successfully numerically modeled.
The possibility of ocean mode tomography realization without expensive low-frequency sources has been investigated. For this purpose, widely discussed method of Green's function estimation from the noise cross-coherence function has been considered. The relation between the Green's function and the noise cross-coherence function has been derived from Helmholtz-Kirchhoff integral. It has been shown that the time collection of noise signal needed for the Green's function determination could be reduced till some hours in adiabatic approach by using vertical mode antennas and vector receivers. Solution of tomography problem has been based on the mode structure definition of acoustic field from eigen values and eigen vectors of noise cross-coherence matrix.
- Burov V.A., Popov A.Y., Sergeev S.N., Shurup A.S. Acoustic ocean tomography with nonstandard representation of refractive inhomogeneities // Acoustical Physics. Vol. 51. ╣ 5. 2005. P. 513-523.
- Burov V.A., Popov A.Y., Sergeev S.N., Shurup A.S. Representation and reconstruction of two-dimentional oceanic flows and eddies in mosaic basis // Proc. of the XVI Session of Russian Acoustics Society. 2005. P. 254-258.
- Burov V.A., Sergeev S.N., Shurup A.S. Acoustical tomography of the nonuniform and moving ocean in non-standard basis // Proc. ţf 8th European Conference on Underwater Acoustics. Carvoeiro. 2006. P. 669-675.
- Burov V.A., Sergeev S.N., Shurup A.S. Meaning of basis choice in acoustic ocean tomography // Acoustical Physics. Vol. 53. ╣ 5. 2007.
- Burov V.A., Gracheva, S.N., Sergeev S.N., Shurup A.S. The tomography reconstruction of the combined refractive-kinetic inhomogeneites in the ocean // Proc. of the XIX session of Russian Acoustics Society. 2007.
- Burov V.A., Sergeev S.N., Shurup A.S. Implementation of low frequency noise in passive ocean tomography // Presented in Acoustical Physics.
- Name: Maria Timoshenko
Place of work: Taganrog Institute of Tecnology Department of Electrohydroacoustical and Medical engineering, Faculty of Electronics and Electronic Equipment Engineering
Date of birth: 8.09.1986
Research title: Diffusion and interaction nano and submicronic particles at acoustic coagulation and sedimentation of aerosols
Research of mutual displacement of particles in an acoustic field is carried out. At interaction of particles in a sound field takes place both rapproachement, and their divergence in a wide range of frequencies.
Comparison of displacement of particles in a field of speeds from a harmonious and pulse component is made. At pulse scoring local concentration of particles increases, that promotes effective coagulation.
Researches nano particles tobaccos smoke are carried out. Calculation of force of interaction of particles with a conducting surface of a sample is made. Dependence of force of interaction of particles and surfaces of a sample from the sizes of particles is received. The more a particle, the more force of coupling. Nanosize high dispersion aerosols represent the greatest health hazard of the person since are not late in the top respiratory ways, which are filters. The received values of forces of interaction of particles coincide by value with force of interaction of a probe with a surface of a sample in └tomic Force Microscope (AFM) that speaks about correctness of estimations.
The laser modulated influence on bioobject always is accompanied by occurrence of acoustic radiation due to thermal expansion. Estimations of values of factors of volumetric expansion, absorption, heat conductivity of a skin, fatty and muscular fabrics, blood and a skull are carried out. At these values for lasers with modulation in a continuous mode sound pressure the tenth shares - units Pa turns out. For pulse lasers sound pressure grows and comes nearer to a level of sound pressure used in acoustic therapeutic devices.
Chernov N.N., Ďimoshenko M. A. The directed drift of particles in a powerful sound field // Taganrog, News ĎSURE. 2005, - ╣ 2 (46). - p. 163-166.
Chernov N.N., Ďimoshenko M.A. Devises of particles of cigarettes smoke// Taganrog, News ĎSURE. 2006, - ╣ 12 (67). - p. 118 - 120.
Chernov N.N., Ďimoshenko M.A.Vtorichnoe acoustic radiation by a biofabric at the laser modulated irradiation // Taganrog, News ĎSURE. 2006, - ╣ 11 (66). - p. 173 - 177.
Chernov N.N., Ďimoshenko M.A.Tezis of the report. Laser-acoustic influence on a biofabric // Taganrog, VII All-Russian scientific conference of under- & post-graduate students. ┼ngineering cybernetics, radio electronics and systems of management. 2006, - p. 308 - 309.
- Name: Sergey Vil'yamov
Place of work: Moscow State Mining University
Date of birth: 21.04.1984
Research title: Acoustic emission of the rock salt dissolving processes at the
underground hydrocarbon storages building
The experiments are connected with the use of the method of acoustic emission (AE) for researches of the rock salt dissolving process. The indicated problem arises with the creation of the underground depositories of hydrocarbons in the salt layers.
The research bears an experimental character. In order to conduct the study, the laboratory installation is developed and assembled with the capacity to dissolve the rock salt specimens, and in addition contains a multichannel computerized measuring system. The system makes it possible to measure and record the weight of the model, and AE signals, and temperature during dissolving.
The purpose of the study is to establish a connection between the parameters of AE signals and the dissolving parameters of different litho types of rock salt, such as the rate of dissolving, the content of the non-dissolved admixture, the dissolving coefficient, etc.
During the course of experimentations, new laws are established that govern the dissolving process. Constancy of this process was determined by the distinctive change in the activity AE, amplitude distributions, and spectra of complete AE signals. Moreover, this is confirmed by the difference in fluctuation of the weight change rate.
In particular, it is established that upon transfer from the first to the third stage there is an observable increase in the relative content of low-frequency components of spectrum in the range from 40 - 50 kHz. Upon transfer from the first to the second stage within the range of 90 - 180 kHz, the relative content of harmonics at first decreases, and then increases. This is the base for the recognition of dissolving stages on the AE signals. The use of root-mean-square spectral components in 7 frequency ranges as informative parameters makes it possible to obtain reliable recognition of stages with the probability of more than 90%.
- Rock salt litotyps recognition on the acoustic emission signals at its dissolution/A. S. Voznesenskiy, E. A. Ertuganova, M. N. Tavostin, S. V. Vil'yamov // Proceedings of the XVI session of the Russian Acoustic Society. Moscow, 2005, pp. 336 - 339.
- Ertuganova E. A., Vil'yamov S. V., Voznesensky E. A. The use on funds of multimedia for studying the acoustic emission processes at the dissolution of rock salt// Mining information-analytical bulletin. Moscow: Moscow State Mining University Publisher House. ╣1, 2006, pp. 131 - 136.
- Studying the mechanism of acoustic emission in failure of rock salt by dissolving /A. S. Voznesenskiy, E. A. Ertuganova, S. V. Vil'yamov, M. N. Tavostin// Physical and technical problems of the development of minerals, 2006, ╣1. (English version: A. S. Voznesenskij, JE. A. JErtuganova, S. V. Vil'yamov, M. N. Tavostin // Studying the mechanism of acoustic emission in failure of rock salt by dissolving // Journal of Mining Science Volume 42, Number 1, January 2006, pp. 35 - 42.
- Voznesenskiy A. S., Ertuganova E. A., Vil'yamov S. V. The laboratory installation for acoustic emission studies of the models of salt rocks with their dissolution// mountain are information - the analytical bulletin of ╣12 - Moscow, 2005, pp. 20 - 25.
- Name: Vage Zakaryan
Place of work: Taganrog Institute of Technology of South Federal University, department of Hydro acoustics and Medical Engineering
Date of birth: 02.05.1983.
Research title: Research of sea mammal's communication signals and construction of rehabilitation system with biological feedback
At the given stage of work computer modelling of communication singing of dolphin with the help of program Cool Edit Pro 2.0 was provided. The comparative spectral analysis of the simulated and written down signals was made. As a result of comparisons identical spectral characteristics are revealed.
The necessary calculations and design of a parametric transmitter were made. Experiments on insonification of biological object placed in the water environment by simulated dolphin signals is now conducted. As the criterion of method efficiency the electroencephalographic signal is used.
Zakaryan V.A., Starchenko I.B Modelling of dolphin audio system for the purposes of ultrasonic therapy, Isvestia TSURE, Taganrog, 2006, p. 182-183.