Reviews of topical problems

Interactions of intense noise waves

Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1 build. 2, Moscow, 119991, Russian Federation

Experiments in statistical nonlinear acoustics are reviewed. Measurements of the average intensities of the harmonics of a narrow-band randomly modulated signal, the nonlinear transformation of broad aerodynamic-noise spectra, and different effects involving the interaction of regular and random waves (active suppression of noise by an intense signal, excess fading of a weak signal in noise fields, cascade-like broadening of spectra, formation of white noise, and other effects) are described. Theoretical explanations are given for the observed phenomena. An approximate method is developed for finding the stochastic solutions of equations of the Burgers and Khokhlov-Zabolotskaya type. Results on the diffraction of intense noise, taking into account the effects of the spatial and temporal statistics, the excitation of random waves by distributed sources, and the formation of steady-state spectra, are presented for the first time. The problems of the nonlinear transformation of the statistical characteristics of acoustic noise and other general questions are discussed.

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Fulltext is also available at DOI: 10.1070/PU1986v029n07ABEH003460
PACS: 43.25.Hg, 43.28.Lv, 43.28.Ra (all)
DOI: 10.1070/PU1986v029n07ABEH003460
Citation: Rudenko O V "Interactions of intense noise waves" Sov. Phys. Usp. 29 620–641 (1986)
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Оригинал: Руденко О В «Взаимодействия интенсивных шумовых волн» УФН 149 413–447 (1986); DOI: 10.3367/UFNr.0149.198607c.0413

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