Wszystkie pola: gas bubbles - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The role of gas bubbles in the acoustical oceanography
Autorzy:: Klusek, Z.
Powiązania:: https://bibliotekanauki.pl/articles/332115.pdf
Data publikacji:: 2000
Wydawca:: Polskie Towarzystwo Akustyczne
Opis:: The paper below presents different aspects of influence of subsurface bubble population on acoustical environment. The role of bubbles in ambient sea noise emission, reverberation processes and signals transmission is presented. The attention has been devoted to specific properties of the Baltic Sea water and its influence on bubble population.
Źródło:: Hydroacoustics; 2000, 3; 91-98
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Towards field measurement of populations of methane gas bubbles in marine sediment: an inversion method required for interpreting two-frequency insonification data from sediment containing gas bubbles
Autorzy:: Leighton, T.
Mantouka, A.
White, P.
Klusek, Z.
Powiązania:: https://bibliotekanauki.pl/articles/331678.pdf
Data publikacji:: 2008
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: methane
marine sediment
gas bubbles
Opis:: This paper describes a key stage in the process for developing a new device for the measurement of gas bubbles in sediment. The device is designed to measure gas bubble populations within the top 2 m of marine sediments, and has been deployed at inter-tidal sites along the South coast of England. Acoustic techniques are particularly attractive for such purposes because they can be minimally invasive. However they suffer from the limitation that their results can be ambiguous. Therefore it is good practice to deploy more than one acoustic technique at time. The new device does just this, but it is designed with the practical economy that the task is accomplished with the minimum number of transducers. One of the measurement techniques relies on insonifying the sediment with two frequencies. This paper outlines how the bubble size distribution is inferred through inversion of the signals detected when two frequencies are projected into the sediment. The high attenuation of the sediment makes this interpretation far more difficult that it would be in water. This paper outlines these difficulties and describes how they can be overcome.
Źródło:: Hydroacoustics; 2008, 11; 203-224
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: On the concentrations of gas bubbles measured acoustically in the Baltic Sea - wind and time dependences
Autorzy:: Klusek, Z.
Jakacki, J.
Powiązania:: https://bibliotekanauki.pl/articles/331914.pdf
Data publikacji:: 1997
Wydawca:: Polskie Towarzystwo Akustyczne
Opis:: A linear and nonlinear two-frequency acoustical technique has been used to make in situ measurements of gas bubbles profiles in the Baltic Sea. At three pairs of frequencies namely 30/35, 57/63 and 110/115 kHz spectral components of linear and nonlinear backscattered signal were extracted and their wind and depth dependences have been calculated. Preliminary results of nonlinear backscattering from the subsurface layer of gas bubbles in different hydrological conditions are presented.
Źródło:: Hydroacoustics; 1997, 1; 103-108
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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