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Wyszukujesz frazę "noises" wg kryterium: Temat


Wyświetlanie 1-3 z 3
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:
Underwater Noises of Open-Circuit Scuba Diver
Autorzy:
Korenbaum, Vladimir
Kostiv, Anatoly
Gorovoy, Sergey
Dorozhko, Veniamin
Shiryaev, Anton
Powiązania:
https://bibliotekanauki.pl/articles/177264.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
underwater acoustics
diver
respiratory noises
noises of fins
open-circuit scuba
breathing apparatus
detection
monitoring
bearing
Opis:
The features of respiratory noises and noises of fins for open-circuit scuba divers, indicating a multipole character of noises emission, are specified in cameral conditions. It demonstrates a possibility to detect low-frequency components of noises of fins with pressure gradient sensor in near field. A possibility of estimating the respiratory rate of an open-circuit scuba diver is demonstrated at distances up to 100 m in real sea. It gives an opportunity of estimating the bearing (time delay in a pair of hydrophones) for the open-circuit scuba diver by respiratory noises at distances up to 150 m in real sea. Thus, low-frequency underwater noises of open-circuit scuba divers may be successfully applied to monitor the safety of diving and to prevent waterside intrusion by trespassers.
Źródło:
Archives of Acoustics; 2020, 45, 2; 349-357
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Approaches to Evaluating the Quality of Masking Noise Interference
Autorzy:
Smailov, Nurzhigit
Batyrgaliev, Askhat
Akhmediyarova, Ainur
Seilova, Nurgul
Koshkinbayeva, Madina
Baigulbayeva, Moldir
Romaniuk, Ryszard
Orunbekov, Maxat
Assem, Kabdoldina
Kotyra, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1844611.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
noise generators
masking noises
TEMPEST
noise rating
Opis:
The paper discusses the characteristics of spatial electromagnetic noise generators, as well as the formation of a broadband noise signal. A number of well-known methods for assessing the quality of masking noise interference and the approaches used in them have been described. Approaches to the measurement of masking noise were also determined in assessing their quality. In conclusion, additional methods are proposed for assessing the quality of masking noises, such as searching for correlation of noise in different frequency sub-bands and using statistical and (or) graphical methods (tests) for randomness.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 1; 59-64
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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