sonar
Underwater echo detection
Sonar is a system that uses sound waves to detect and locate objects underwater, working much like radar does with radio waves in air.
The term comes from "sound navigation and ranging." Ships and submarines use sonar to navigate, find other vessels, and map the ocean floor.
Sonar can be active, sending out pulses and listening for echoes, or passive, simply listening for sounds made by other objects.
The submarine's sonar detected an approaching vessel.
Brief metallic tone
- echoReflected sound wave
- transducerEnergy form converter
- hydrophoneSubmersible sound sensor
- waveformGraphed oscillation pattern
reverberation · backscatter · propagation · attenuation · frequency · hertz · kilohertz · ultrasound
Brief metallic tone
- contactCommunication or physical touch
- targetObject of pursuit
- bearingPosture or orientation
- rangeExtent of variation
sweep · tracking · classification · signature · anomaly · localization · search · monitoring
Navigation through reflected sound
- dolphinEcholocating marine mammal
- whaleHuge sea mammal
- batFlying mammal or sports club
- porpoiseSmall toothed whale relative
biosonar · cetacean · clicking · melon · spermaceti · orca · beluga · narwhal
Energy form converter
- hydrophoneSubmersible sound sensor
- sonobuoyDisposable oceanic acoustic monitor
- biomimicryDesign imitating natural systems
- forward-lookingOriented toward the future
array · receiver · transmitter
Subaqueous topographical measurement
Propelled undersea explosive
- periscopeAngled optical viewing tube
- depth-chargeSinking explosive for submarines
- submersibleUnderwater exploration vehicle
- U-boatUndersea warship from Germany
hunter-killer · wolfpack · sonarman · evasion · cavitation · baffles · countermeasures
ping
Brief metallic tone
- echoReflected sound wave
- transducerEnergy form converter
- hydrophoneSubmersible sound sensor
waveform · reverberation · backscatter · propagation · attenuation · frequency · hertz · kilohertz · ultrasound · amplitude
ping
Brief metallic tone
range · sweep · tracking · classification · signature · anomaly · localization · search · monitoring · identification
echolocation
Navigation through reflected sound
porpoise · biosonar · cetacean · clicking · melon · spermaceti · orca · beluga · narwhal · communication
transducer
Energy form converter
- hydrophoneSubmersible sound sensor
- sonobuoyDisposable oceanic acoustic monitor
- biomimicryDesign imitating natural systems
bathymetry
Subaqueous topographical measurement
torpedo
Propelled undersea explosive
- periscopeAngled optical viewing tube
- depth-chargeSinking explosive for submarines
- submersibleUnderwater exploration vehicle
U-boat · hunter-killer · wolfpack · sonarman · evasion · cavitation · baffles · countermeasures
- detection methodsMRI, ultrasound, DNA testing, fingerprinting, blood test
- imaginaridear
- defense systemsshield, armor, missile defense, bunker, helmet
- marine navigationnautical charts, marine charts, buoys, compass, markers
- measurement toolsruler, scale, gauge, thermometer, stopwatch
- naval patrolpatrol boat, destroyer, frigate, corvette, subchaser
sonarpassive sonar
Sound detection without emission
stealth technology · sound absorption · silent running · noise dampening
- sonar pingAcoustic signal for detection
- active sonarSound-emitting detection method
- multibeam sonarWide-swath acoustic seabed mapping
- sonar technologySound-based underwater detection system
- sonar detectionLocating objects via sound waves
- sonar imagingSound-wave underwater detection