Imagine a layer of the ocean so teeming with life that, when first discovered, scientists mistook it for the seafloor. This ...

Let's say that a vessel did use active sonar around living things. What would happen? Sound travels in waves. You've likely been to a concert where you could feel the bass coming from the stage.

That fact makes cloaks tricky to design: The waves of sound or light must come back to the detection device -- be it sonar microphones, human eyeballs or radar -- with the same shape and frequency ...

Sound can actually travel thousands of miles in water without losing its signal. Sonar works by sending out sound waves that will bounce off objects, which creates an echo.

Types of Sonar: Active vs. Passive. There are two types of sonar: active and passive. Active sonar involves a warship broadcasting directed sound waves underwater: If the sound waves strike an ...

This is because water is much denser than air, and so can respond faster and better to acoustic pressure waves – sound waves. Because of these properties, ships use sonar to navigate through the ...

Sound waves are produced by a vibrating object. ... This technique is applied in sonar systems used to measure the depth of the seabed and to find shipwrecks, submarines and shoals of fish.

STRIKE a metallic object, and you’ll hear a sharp clang. Knock on wood, and you get a dull thunk. It’s the basic principle behind sonar – sound waves reflecting off different objects.