Field of a directional low-frequency acoustic emitter in the boundary layer of the atmosphere

I. V. Semenova ; A. A. Korneeva

Vestnik Samarskogo universiteta. Estestvennonaučnaâ seriâ, Tome 29 (2023) no. 1, pp. 64-73

Résumé

Due to the fact that many wave emitters that a person is able to perceive belong to low-frequency ones, studies of sound fields created by such emitters are relevant. Thanks to the results obtained, it becomes possible to understand in which directions and with what power the sound field created by them will propagate, form practical recommendations for choosing the zone most suitable for observing them, solve inverse problems to determine their location. As a result of the analysis of existing models used to describe acoustic emitters, it was found that the most adequate models are those that take into account the directionality of sound sources. Among them, the parametric model proposed by G.N. Kuznetsov and A.N. Stepanov deserves special attention, which was used in the work. As a model representation of the atmosphere, a system of homogeneous layers was chosen, in one of which the source is located. For the selected models of the source and medium, the boundary value problem of finding the potential of the field created by the source is set, exact and approximate relations are obtained that can be used to solve direct and inverse problems associated with a multipole emitter. The influence of such factors as the height and frequency of the source, as well as the horizontal distance between the source and receiver on the amplitude component of the field has been studied.

Détail

Keywords: directional low-frequency emitter, inhomogeneous space, system of homogeneous layers, acoustic emitter field, field potential
Mots-clés : amplitude, reflection coefficient, impedance.

Bibliographie

[1] Pachner J., “On the dependence of directivity patterns on the distance from emitter”, Journal of the Acoustical Society of America, 28:1 (1956), 86–90 | DOI | MR

[2] Horton C.W., Sabey A.E., “Studies on the near field of monopole and dipole acoustic sources”, Journal of the Acoustical Society of America, 30:12 (1958), 1088–1099 | DOI

[3] Isakovich M.A., “Nonlinear effect accompanying the dipole radiation”, 4th Int. Congr. Acoustics (Copenhagen, 1962), v. 1, 3–4 (NK 55)

[4] Glebova G.M., Kuznetsov G.N., “Methods for estimating the reduced noise of a moving monopole source in shallow water”, Acoustical Physiscs, 67:3 (2021), 273–282 (In English; original in Russian) | DOI | DOI

[5] Kuznetsov G.N., Stepanov A.N., Semenova I.V., “Local anomalous sound field zones in shallow water. Experiment and simulation”, Acoustical Physiscs, 67:6 (2021), 619–630 (In English; original in Russian) | DOI | DOI | MR

[6] Sumbatyan M.A., Martynova T.S., Musatova N.K., “To diffraction of a point sound source on an infinite wedge”, Acoustical Physiscs, 68:4 (2022), 351–360 (In Russian) | DOI

[7] Oestreicher H.L., “Representation of the field of an acoustic source as a series of multipole fields”, Journal of the Acoustical Society of America, 29:11 (1957), 1219–1222 | DOI | MR

[8] Bobrovnitskii Yu.I., “A Physical Model and the Near Field Characteristics of a Multipole”, Acoustical Physiscs, 44:1 (1998), 11–20 (In Russian)

[9] Sharfaretz B.P., “Extended source field in a non-regular ocean waveguide”, Acoustical Physiscs, 38:2 (1992), 245–349 (In Russian)

[10] Sharfarets B.P., “Representation of the pressure field of an extended source as a geometric-optical series in the two-dimensional case”, Nauchnoe Priborostroenie = Scientific Instrumentation, 11:4 (2001), 41–45 (In Russian)

[11] Welkowitz W., “Directional circular arrays of point sources”, Journal of the Acoustical Society of America, 28:3 (1956), 362–366 | DOI

[12] Vinogradova E.L., Furduev V.V., “Directivity coefficient of a linear group of emitters”, Acoustical Physiscs, 12:2 (1966), 181–184 (In Russian)

[13] Bobrovnitskii Yu.I., Tomilina T.M., “General Properties and Fundamental Errors of the Method of Equivalent Sources”, Acoustical Physiscs, 41:5 (1995), 737–750 (In Russian)

[14] Brekhovskikh L.M., “Reflection and refraction of spherical waves”, Physics-Uspekhi = Advances in Physical Sciences, 38:1 (1949), 1–42 (In Russian) | DOI

[15] Van Moorhen W.K., “Reflection of a spherical wave from a plane surface”, Journal of Sound and Vibration, 42:2 (1975), 201–208 | DOI | Zbl

[16] Matthen Nobile A., Hayek Sabih I., “Acoustic propagation over an impedance plane”, Journal of the Acoustical Society of America, 78:4 (1985), 1325–1336 | DOI | MR

[17] Glebova G.M., Zhbankov G.A., Kuznetsov G.N., “Experimental evaluation of radiation directivity of a moving surface vessel in a shallow sea”, Acoustical Physiscs, 68:1 (2022), 57–67 (In Russian) | DOI

[18] Kuznetsov G.N., Stepanov A.N., Vector-scalar fields of multipole hydroacoustic sources equivalent to the noise emission of marine objects, «Buki Vedi», M., 2022, 304 pp. (In Russian)

[19] Aksenov S.P., Kuznetsov G.N., “Amplitude and phase structure of a low-frequency hydroacoustic field in the deep ocean”, Acoustical Physiscs, 67:5 (2021), 474–485 (In English; original in Russian) | DOI | DOI

[20] Tyshchenko A.G., Zaikin O.S., Sorokin M.A., Petrov P.S., “Software package for calculating acoustic fields in shallow seas based on the method of wide-angle mode parabolic equations”, Acoustical Physiscs, 67:5 (2021), 533–541 (In Russian) | DOI

[21] Lunkov A.A., Petnikov V.G., Sidorov D.D., “The use of linear receiving antennas to observe the horizontal refraction of low-frequency sound in a shallow sea with a highly heterogeneous water-like bottom”, Acoustical Physiscs, 68:4 (2022), 400–408 (In Russian) | DOI

[22] Kuznetsov G.N., Stepanov A.N., “On the possibility of increasing the noise immunity in detecting sound signals in a shallow water using energy and phase invariants”, Acoustical Physiscs, 68:3 (2022), 262–271 (In English; original in Russian) | DOI | DOI

[23] GOST R 54084-2010. Models of the atmosphere in the boundary layer at altitudes from 0 to 3000 m for aerospace practice. Parameters, national standard of the Russian Federation: date of introduction 2012-01-01 (In Russian)

[24] Petukhov Yu.V., “On the possibility of non-reflective propagation of plane acoustic waves in continuously stratified media”, Acoustical Physiscs, 68:2 (2022), 129–138 (In Russian) | DOI

[25] Korneeva A.A., Semenova I., “Field of a directional low-frequency emitter in a multi-layer region”, XXIII all-russian conference of young scientists on mathematical modeling and information technologies (Novosibirsk, 2021), 362–365 (In Russ.)