Discover published sets by community

A ping in sonar terminology is a pulse of sound emitted by the active sonar system.

Echo ranging involves emitting a sound pulse and timing how long it takes for the echo to return to determine the distance to an object.

Acoustic propagation refers to how sound travels through a medium like water, including the effects of spreading, absorption, and refraction.

A false echo is an erroneous sonar reading that appears to be a return from a target but is actually caused by other factors like equipment malfunction or environmental causes.

A sonar array is a set of hydrophones arranged in a pattern, used to detect and locate sounds in water.

Reverberation in sonar is the persistence of sound in the marine environment due to multiple reflections from the sea surface, bottom, and other objects.

The Doppler Effect refers to the change in frequency of a sound wave for an observer moving relative to its source. In sonar, it is used to measure the velocity of an object.

Target strength is a measure of the ability of an object to reflect sonar signals, expressed in decibels (dB).

The Sound Velocity Profile is a plot of the speed of sound at various depths in the ocean, which affects sonar wave propagation.

Active sonar systems emit an acoustic signal or pulse of sound into the water. If an object is present, the sound bounces back to the sonar source as an echo and is detected.

Passive sonar listens without transmitting. It detects noise from marine objects and uses it to determine the location and velocity of the objects.

A hydrophone is a microphone designed to be used underwater for recording or listening to underwater sound.

Beamforming is a technique that uses the relative phase and amplitude information from a sonar array to determine the direction of incoming sounds.

Flanker noise refers to noise that is not coming directly from the target but from other sources in the ocean, which can interfere with sonar readings.

A sonar dome is a structure attached to the hull of a ship that houses the sonar array, protecting it from incoming noise and damage.

A sonobuoy is a buoy equipped with a sonar system that is dropped from a ship or aircraft to conduct sonar searches.

The thermocline is a layer in the ocean where there is a rapid change in temperature which can significantly affect the propagation of sonar waves.