Sapozhnikov O.A., Morozov A.V., Cathignol D. «Acoustic holography and laser vibrometry to characterize vibration of piezoceramic and piezocomposite transducers used in ultrasound therapy» High intensity acoustic waves in modern technological and medical applications. Joint Workshop of Russian Acoustical Society (RAS) and French Acoustical Society (SFA). Special Session of the XVI Meeting of Russian Acoustical Society (Moscow. 14–18 November 2005), с. 20-29 (2005)

Acoustic pressure radiated by piezoelectric sources can be predicted based on the normal velocity distribution along vibrating surface. However, up to now, there are no reliable direct methods of surface vibration measurement in liquids. The transducer vibration is frequently considered as being uniform (thickness mode), which may be incorrect due to transducer structure or due to excitation of Lamb waves in it. In this work, a holographic method is developed and experimentally used that enables reconstruction of the radiator vibration pattern. The method includes a measurement of wave amplitude and phase in different points of a plane grid perpendicular to the acoustic axis at some distance from the source, theoretical time reversal of the waveform in each grid-point, and back propagation of the field to the source using the Rayleigh integral. In addition to the holographic approach, vibration of piezoelectric transducers was studied using laser vibrometry. It is demonstrated that the latter method gives wrong results when the transducer is in contact with liquid, because of strong acousto-optic interaction. It is shown that although the acoustic holographic approach has limited spatial resolution (of order of a wavelength), it allows fairly exact prediction of the radiated field pattern.

Oraevsky A.A., Karabutov A.A., Solomatin S.V., Savateeva E.V., Andreev V.G., Gatalica Z., Singh H., Fleming R.D. «Laser optoacoustic imaging of breast cancer in vivo» Акустика неоднородных сред. Ежегодник Российского акустического общества. Труды научной школы проф. С.А. Рыбака. Вып. 2, с. 102 (2001)

Sebaa N., Fellah Z.E.A., Depollier C., Lauriks W. «Direct and inverse scattering problem in cancellous bone: application of biot theory» High intensity acoustic waves in modern technological and medical applications. Joint Workshop of Russian Acoustical Society (RAS) and French Acoustical Society (SFA). Special Session of the XVI Meeting of Russian Acoustical Society (Moscow. 14–18 November 2005), с. 92-99 (2005)

In this paper direct and inverse scattering problems of ultrasonic pulses from cancellous bone are investigated. Reflection and transmission coefficients are derived for a slab of cancellous bone having an elastic frame using Biot’s theory. The inverse problem for waves transmitted by cancellous bone is solved at normal incidence. Experimental results for slow and fast waves transmitted through cancellous bone samples are given and compared with theoretical predictions.

Oraevsky A.A., Karabutov A.A., Solomatin S.V., Savateeva E.V., Andreev V.G., Gatalica Z., Singh H., Fleming R.D. «Laser optoacoustic imaging of breast cancer in vivo» Акустика неоднородных сред. Ежегодник Российского акустического общества. Труды научной школы проф. С.А. Рыбака. Вып. 2, с. 102 (2001)

Oraevsky A.A., Karabutov A.A., Solomatin S.V., Savateeva E.V., Andreev V.G., Gatalica Z., Singh H., Fleming R.D. «Laser optoacoustic imaging of breast cancer in vivo» Акустика неоднородных сред. Ежегодник Российского акустического общества. Труды научной школы проф. С.А. Рыбака. Вып. 2, с. 102 (2001)

Воронович А.Г., Осташов В.Е., Colosi J.A., Cornuelle B.D., Dushaw B.D., Dzieciuch M.A., Howe B.M., Mercer J.A., Spindel R.C., Worcester P.F. «Исследование горизонтальной рефракции акустических сигналов по данным акустической лаборатории NPAL» Доклады 9 научной школы-семинара академика Л. М. Бреховских "Акустика океана", совмещенной с 12 сессией Российского акустического общества, с. 88 (2002)

Didenkulov I.N., Kustov L.M., Pronchatov-Rubtsov N.V., Stromkov A.A. «Methods of the nonlinear acoustic vision of objects and defects» High intensity acoustic waves in modern technological and medical applications. Joint Workshop of Russian Acoustical Society (RAS) and French Acoustical Society (SFA). Special Session of the XVI Meeting of Russian Acoustical Society (Moscow. 14–18 November 2005), с. 128-134 (2005)

Nonlinear acoustic methods are found increasing applications during the last decade. In this paper we describe methods of acoustic imaging based on the nonlinear effects: the combination acoustic scattering and the modulation of high-frequency acoustic wave by low-frequency wave. Acoustic vision of objects at the difference frequency was studied using bubbles as strongly nonlinear scatterers. The experiments were carried out in a water tank with metal objects covered with electrolysis microbubbles to produce highly nonlinear scattering from the object surfaces. Images of the objects were obtained. The nonlinear scattering by bubbles was also used to obtain an image of the cavitation flow. Nonlinear acoustic vision of small (in the scale of wavelength) defects is possible when tomography schemes are applied. We used the method of nonlinear modulation modal spectroscopy for defectoscopy of cracks in metal samples. Results of investigation demonstrate possibilities of the nonlinear acoustic techniques in nondestructive testing of different media.