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Wyszukujesz frazę "Listewnik, K." wg kryterium: Autor

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    Wyświetlanie 1-10 z 10
    Tytuł:
    Experimental investiation of hydroacoustic multi-sensor array in water tank
    Autorzy:
    Listewnik, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/331822.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Opis:
    The paper presents the experimental research associated with hydroacoustic multisensor array which is used for positioning object in water environment. Moreover, the paper presents the methodology of determination of target localization from bearing angles, and its accuracy. The construction of multi-sensor array consist of four hydrophones and it has a shape of a tetrahedron. This three-dimensional array is well known as a good solution of passive sonar and it is made of four elements assumed to have identical features and lying on a plane. The position of each hydrophones in a tri dimensional coordinate system correspond to the direction of the arriving acoustic plane wave. These features cause that the tetrahedral antenna has significant civil and military applications.
    Źródło:
    Hydroacoustics; 2011, 14; 127-134
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The primary sources of ship noise observed on the bottom of sea
    Autorzy:
    Listewnik, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/331932.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Opis:
    The paper presents the experimental research associated with the spatial distribution of acoustic energy generated by moving ship into the shallow water. Moreover, the paper present the methodology of determination of acoustics energy from the main mechanisms of ship into the water environment. For that purpose the research of noise spatial distribution of the ship were conducted along the hydroacoustic field. This research allowed to determine ship signature spatial distribution of chosen main mechanisms on the bottom of sea.
    Źródło:
    Hydroacoustics; 2010, 13; 163-170
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of vibration of ships generating set on emitted acoustic energy
    Autorzy:
    Listewnik, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/332358.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Opis:
    The article presents the investigations of influence of vibration of generating sets on the hydroacoustic spectrum’s structure generated through hull of ship to water environment. The investigations were conducted on anchor and during movement of the ship, with characteristic parameters of movement of the ship. The influence of change of speed governor driving engine was considered on produced the voltage’s frequency under of load variations the ship’s electrical system. It the tests, there were conducted the vibrations’ measurements on engine-bed of the individual generating set, on the ship’s hull of directly under sets, as well as the measurements of underwater noise under hull of ship. The analysis consist with the qualification of levels of the measured parameters and the changes spectrum’s vibrations of underwater noise as well as their correlations. It was analysed with possible exploational states of the ship, number of working generating sets, and thei reconfigurations. In the papier we described the guidelines to methodology of investigations of generating sets near state exploational variables of the ship. This joins closely with qualification of possible state of exploational ship, which is important for military regards.
    Źródło:
    Hydroacoustics; 2006, 9; 97-102
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The examination of position of ships noises sources based on hydroacoustics method
    Autorzy:
    Listewnik, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/331584.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Tematy:
    hydroacoustics method
    ship’s noises sources
    hydroacoustics
    Opis:
    The paper presents the experimental research associated with the transmission of acoustic energy generated by moving ship into the water. The paper present the methodology of evaluations acoustics energy from the mechanisms of ship into the water environment. For that purpose the research of noise distribution over ship's hull were conducted along with the hydroacoustic field. The hull is source of waves of complex surface shape inducing waves of different amplitudes and phases depending on the position of ship's machinery. As a result of the hull vibrations generated wave distribution depending on the primary sources, as the main propulsion units, generators or other mechanisms. This research allowed to determine position of the main noises' sources of acoustics energy of machinery and propulsion system depending on class of ships.
    Źródło:
    Hydroacoustics; 2008, 11; 247-253
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of influence of ships generating set on emitted acoustic energy
    Autorzy:
    Listewnik, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/332143.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Opis:
    The article present the investigations of influence of load variations the ordered electrical energy of ships generating set on structure of spectrum of the hydroacoystic noise generated by ships hull to the water enviroment. This joins closely with qualification og possible state of exploational ship, which is important with military regards.
    Źródło:
    Hydroacoustics; 2004, 7; 157-162
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Disturbances in noise propagation generated by a moving ship in shallow water
    Autorzy:
    Listewnik, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/332649.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Opis:
    Noise propagation generated by a moving ship in shallow water is always associated with energy loss because of absorption and the fact that sound is scattered by medium inhomogeneities, also resulting in a decrease of sound intensity with range. Furthermore sound propagation is strongly dependent on fluid space geometry and dimension, as well as reflection and transmission loss through the sea bottom. The geometrical dimensions of the measured ship and shallow water are comparable. The depth of water is usually less than the length of the ship, so machinery vibration - due to propulsion machinery and auxiliary machinery - acoustic noise in the compartments below the waterline, flow noise and propeller noise are not generated by the hull of the ship from one point only. Hydroacoustic measurement range is designed with the purpose of exploiting and distinguishing these effects because of the amount of information they each bring; they allow to identify a different class of ship, although interpretation of spatial distribution is very difficult because of sound propagation in shallow water. This paper presents experimental research into the noises of moving ships, measured on the sea bottom, with reflection about the influences of sound propagation on the results of underwater acoustic measurement ranges.
    Źródło:
    Hydroacoustics; 2014, 17; 137-142
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial distribution of underwater sound generated by hull of moving ship
    Autorzy:
    Listewnik, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/332792.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Tematy:
    underwater sound
    ship
    acoustics
    Opis:
    The paper presents the experimental research associated with the spatial distribution of acoustic energy generated by moving ship into the water. The paper present the methodology of evaluations acoustics energy from the mechanisms of ship into the water environment. For that purpose the research of noise spatial distribution over ship's hull were conducted along with the hydroacoustic field. The hull is source of waves of complex surface shape inducing waves of different amplitudes and phases depending on the position of ship's machinery. As a result of the hull vibrations generated wave distribution depending on the primary sources, as the main propulsion units, generators or other mechanisms. This research allowed to determine position of the main noises' sources of acoustics energy of machinery and propulsion system depending on class of ships and to designate spatial distribution of noise generated by hull of moving ship.
    Źródło:
    Hydroacoustics; 2009, 12; 109-116
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Historical torpedo proving ground on the Puck Bay and Polish Navy Control and Measurement Unit
    Autorzy:
    Kamińska, K.
    Listewnik, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/332788.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Tematy:
    history of Puck Bay
    ships signatures history
    signature ranges
    Opis:
    This article briefly presents a description of the historic use of the Puck Bay area to test military equipment, and the history of the Polish Navy Control and Measurement Unit, main tasks and facility. The aim of this presentation is to bring together participants in the symposium of the general background of activities in the area of hydroacoustics many times presented previously. In addition, the present symposium is devoted to the memory of Capt. Ignacy Gloza, who has served here for many years. Finally, the traditional annual tour organized during the symposium this year took place in the waters of the Puck Bay, and one of the aims of this presentation is to bring the participants closer to what they see.
    Źródło:
    Hydroacoustics; 2017, 20; 179-185
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison between measured and calculated underwaterpressure of merchant ship
    Autorzy:
    Bielański, J.
    Listewnik, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/332729.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Tematy:
    pressure siganture of ship
    underwater pressure calculation
    underwater pressure masurement
    comparision underwater pressure of ship
    Opis:
    From 2012 The Polish Naval Academy take part in an international research project SIRAMIS, carried out in the framework of the European Defence Agency. The objective of this project is to improve the understanding of ship signature interaction with multi influence sensors in relevant and realistic scenario's. This paper describes selected results of the comparison results of sea trials and model calculations of the hydrodynamic field distribution around a moving ship in selected waters of The Gulf of Gdansk. Despite the good results of the comparison of calculations and measurements of pressure signature on the example of a passenger ship, some measurements deviate significantly from the theoretical results. Due to the lack of reproducibility of these deviations may be due to errors in reading real position of underwater measurement modules. This comparison allows increasing the reliability of theoretical calculations by the results of measurements, and it is expected that the development of this method allows determining the parameters of the pressure under the hull at any point situated at a distance of not more than 1 meter from the seabed.
    Źródło:
    Hydroacoustics; 2015, 18; 7-16
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Data compression and clustering of one-third-octave spectra by acoustical colors
    Autorzy:
    Józwiak, R.
    Nissen, I.
    Listewnik, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/332570.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Tematy:
    cumulative value
    acoustical colors
    hydroacoustic measurement
    underwater communication
    Opis:
    This article presents a new approach for the data compression and clustering of one-third octave spectrum by using "acoustical colours". Using in-situ measurements by the IGLOO – sensor nodes it can show that this approach allows a clustering of the colors for a quick look classification. This is helpful using wireless acoustical transmissions with restricted transfer volume in underwater sensor networks without jamming their own measurements.
    Źródło:
    Hydroacoustics; 2017, 20; 85-92
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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