Search results
Results from the WOW.Com Content Network
When looking at diesel driven vessels, the engines induce large accelerations that travel from the foundation of the engine throughout the ship. In most compartments, this type of vibration normally manifests itself as audible noise. The problem with diesels is that, for a given size, there is a fixed amount of power generated per cylinder.
It also includes a fiber optic display LAN. Previous versions could only simulate ship noise and were effective against passive homing torpedoes but ineffective against active homing torpedoes; the AN/SLQ-25B added the ability to defeat active homing torpedoes by intercepting, amplifying, and returning the sonar pings from the incoming torpedo.
The DUBV 43C towed array sonar of La Motte-Picquet.. A towed array sonar is a system of hydrophones towed behind a submarine or a surface ship on a cable. [1] Trailing the hydrophones behind the vessel, on a cable that can be kilometers long, keeps the array's sensors away from the ship's own noise sources, greatly improving its signal-to-noise ratio, and hence the effectiveness of detecting ...
Large commercial ships are the dominant human-generated contributors to low-frequency noise across ocean basins, which wildlife rely on for survival. Put your cruise on silent mode, please: Why ...
The goals of the Ship Silencing Program are a reduction of sonar self noise over the frequency range of passive capable sonar and the reduction in the ship's radiated noise to reduce detection by enemy submarines. [citation needed] Self-noise is the noise generated by a ship that has an effect on its own sonar and sensors. Radiated noise is the ...
If the target radiated noise level is high enough, it can have a greater range than active sonar, and allows the target to be identified. Since any motorized object makes some noise, it may in principle be detected, depending on the level of noise emitted and the ambient noise level in the area, as well as the technology used. To simplify ...
Zener diode based noise source. A noise generator is a circuit that produces electrical noise (i.e., a random signal). Noise generators are used to test signals for measuring noise figure, frequency response, and other parameters. Noise generators are also used for generating random numbers. [1]
Cavitation noise: noise generated by the creation of gas bubbles by the turning of a ship's propellers. Hydrodynamic noise: noise generated by the movement of water displaced by the hull of a moving vessel. These emissions depend on a hull's dimensions, the installed machinery and ship's displacement. Therefore, different ship classes will have ...