This vibrates the cone which creates the sound waves. Sound waves can reflect off surfaces. We hear reflected sound as an echo. Hard, smooth surfaces are particularly good at reflecting sound.

Alexander Behm sails the North Sea and bounces sound waves off its bottom, advancing a new method of depth measurement known as echo sounding. William Beebe and Otis Barton descend in a tethered ...

And the results are over 95% accurate." An echo test involves ultrasound-- high-frequency sound waves -- to evaluate the function of heart muscle and valves, the same technology used to ensure a ...

If the sound isn't enough for you, the Echo can be stereo-paired with another ... if you want to use Z-Wave products, like the August Smart Lock, you're out of luck. And finally, pairing a device ...

Aero Erosion is a negative status effect in Wuthering Waves, which can be applied by ... If the leaks turn out to be true, the new Aero DMG Echo set may be useful for Aero Rover as well as a ...