Sonar Technologies

Silvery metal, that can be cut with a knife. Terbium alloys and additives are widely used in optoelectronics to burn CDs as well as in laser printers. The pronounced magnetostriction (Joule effect) makes "terfenol-D" (terbium-dysprosium-iron) indispensable in sonar technology. The physics of the element appears to be more interesting than its chemistry, in which it is rarely used in catalysis. 

Diagnostic ultrasound based on sonar technology became so widely accepted that ultrasonic studies are now part of the routine diagnostic workup in many medical specialties. 

Acoustic holography and sonar technology have been used in research by the United States Navy, which has also worked with holographic cameras capable of operating underwater. 

See also Aeronautics and Aviation Computer Science Engineering Geoinformatics Maps and Mapping Robotics Sonar Technologies Trigonometry. 

Sonar technology embraces the use of sound waves to facilitate travel and use of waterways, primarily the ocean. Through the use and detection of sound waves, sonar enables ships to avoid underwater obstacles and discover the ocean s resources. Naval forces use sonar to locate, target, and destroy hostile forces. Sonar started out as simply listening to sound in the ocean, but as technology improved sonar became a complex system of emitters, receivers, and processors that enabled a much wider use in bodies of water of all sizes. 

ASDIC Acronym for the developers of the first military application of sonar technology, Anti-Submarine Detection and Investigation Committee, created during World War I. 

See also AntibaUistic Missile Defense Systems Military Sciences and Combat Engineering Naval Architecture and Marine Engineering Oceanography Sonar Technologies. 

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