Estimating the Amplitude of Wind Waves by Correlation Analysis of the Reverberation Signal

Autor:	B. M. Salin, M. B. Salin, O. N. Kemarskaya
Rok vydání:	2019
Předmět:	010302 applied physics Physics Reverberation Acoustics and Ultrasonics Scattering Acoustics 01 natural sciences Signal symbols.namesake Correlation function (statistical mechanics) Amplitude Position (vector) 0103 physical sciences Wind wave symbols 010301 acoustics Doppler effect
Zdroj:	Acoustical Physics. 65:41-51
ISSN:	1562-6865 1063-7710
Popis:	Correlation analysis of low-frequency reverberation signals has been carried out by decomposing the reverberation into reference functions, formed as a set of signals reflected from a point scatterer moving along a circular trajectory. The choice of the reference signal is related to the model of sound scattering by inhomogeneities (bubbles) occurring in the near-surface layer and moving together with the orbital currents of wind waves. The study demonstrated that the correlation functions differ significantly (by 5–6 dB) for the region of position and negative Doppler frequencies of reverberation signals. A stable increase has been revealed for the maximum of the correlation function at certain radii of scatterer motion, which are related to the amplitudes of wind waves.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d2da8f3603cd43751305832c449690b7 https://doi.org/10.1134/s1063771019010093 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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