Acoustical Physics Volume 58 Issue 2, Page 2

Journal Article

Monitoring of seismoacoustic signals and anthropogenic noise on the shelf of Sakhalin Island

Rutenko, A. N.; Gavrilevskii, A. V.; Kovzel’, D. G.; Korotchenko, R. A.; Putov, V. F.;

2012 Acoustical Physics

Abstract We present a description of the technique and results of many days’ measurements of acoustic noise and the parameters of seismoacoustic signals on the northeast shelf of Sakhalin Island generated in the course of seismoacoustic research in the Lebedinsky licensed sector. The goal of...

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Journal Article

Calculation of the reverberation spectrum for Doppler-based sonar

Salin, B. M.; Salin, M. B.; Spindel, R. C.

2012 Acoustical Physics

doi:10.1134/s1063771011050150

Abstract For monostatic sonar using long pulsed tone signals, the problem of evaluating the spectrum of reverberation due to sound wave scattering by a rough sea surface is solved. Relatively simple computational schemes are proposed, which make it possible (i) to transform the three-dimensional...

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Journal Article

Screenless unidirectional hydroacoustic transducers with electrically controlled radiation interference in the rear direction

Stepanov, B. G.

2012 Acoustical Physics

doi:10.1134/s106377101201023x

Abstract The results of calculations of frequency characteristics are presented that were obtained from solution of the synthesis and analysis problems for broadband unidirectional rod transducers with controlled interference of acoustic waves in the rear direction provided by the phase...

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Journal Article

Reverberation generated by sequential underwater explosions

Sheng, Zhen-xin; Liu, Rong-zhong; Guo, Rui

2012 Acoustical Physics

doi:10.1134/s1063771012020200

Abstract In order to obtain long-time reverberation, an innovative experiment is operated, using a sequence of explosions with a interval time. The relationship between reverberation generated by single explosion and a sequence of explosions is discussed. The data are obtained from the...

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Journal Article

Noise signal propagation in soft biological tissues

Rudenko, O. V.; Gurbatov, S. N.

2012 Acoustical Physics

doi:10.1134/s1063771012020157

Abstract Mathematical models are formulated that discribe linear and nonlinear wave propagation in biological tissues. The basis of the method is evolutionary integro-differential equations with a kernel that takes into account the specific properties of tissue. An equation is obtained for the...

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Journal Article

A practical acoustical absorption analysis of coir fiber based on rigid frame modeling

Ayub, Md.; Nor, Mohd Jailani Mohd; Fouladi, Mohammad Hosseini; Zulkifli, Rozli; Amin, Nowshad

2012 Acoustical Physics

doi:10.1134/s1063771012020194

Abstract An analytical study based on rigid frame model is demonstrated to evaluate the acoustic absorption of coir fiber. Effects of different conditions such as combination of air gap and perforated plate (PP) are studied in this work. Materials used here are treated as rigid rather than...

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Journal Article

Measurement of the directional pattern of a piezoelectric transducer by the half-cylinder reference block

Bazulin, A. E.; Bazulin, E. G.

2012 Acoustical Physics

doi:10.1134/s1063771012020030

Abstract The possibility of measuring the directional pattern of a contact piezoelectric transducer with the use of a CO-3 reference block by measuring the field reflected from the concave cylindrical block surface is substantiated. The advantages of such measurements over those using the CO-2...

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Journal Article

The stabilizing effect of feedback on the operation of an active noise control system

Kanev, N. G.

2012 Acoustical Physics

doi:10.1134/s1063771012010113