Repozytorium publikacji - Politechnika Gdańska

The paper contains the result s, both theoretical and experimental , connected with the tracking of the underwater noise source as small ships, pontoon , diver and so on. The pro blem of security in the shallow water area is the challenge for underwater acousticians. In this paper there is take n into account the detection of the sources that move on the surface of the sea or underwater in shallow and very shallow water. The main go al deal s with characterization of the sound propagat ion at the shallow water channel . The next problem is formulation of the sound propagation inside of this acoustic duct including normal mode creations and dispersion of the acoustic energy. When we take into account the small ships noise the two main sources are analyzed. The first one is the vibration energy produced by the mechanisms located inside of the ship hull. The acoustical energy is transformed through structural elements of the hull to surroun ding water. This energy propagates as broadband underwater noise. The next source is the ship propeller. The sources of the underwater noise give the some deposit t o the total acoustical energy that means the ambient noise. The problem that should be solve d is to discover th ese acoustical disturbances along with their classifi cation , identifi cation and tracking

Autorzy

• prof. dr hab. inż. Grażyna Grelowska link otwiera się w nowej karcie ,
• prof. dr hab. inż. Eugeniusz Kozaczka link otwiera się w nowej karcie