what is the name given to the reflected sound waves in a cave or an empty hall
Sound waves are longitudinal waves; they travel from side to side, not up and down like transverse waves.
You can hear the people speaking because sound waves are reflected off of other objects (walls, trees, etc.). When the waves are reflected, they can still make it to your position and allow you to continue hearing the people as they walk. Sound waves bend around the corner.
This is echo.
A good example is vibrating guitar strings, as they are transverse, but the waves given off are sound, and sound is longtitude.
Echoes of sound and images in a mirror involves sound waves and light waves respectively being reflected off a surface.
When the sound waves are reflected, the result in the producing of an echo.
Produced by reflected sound waves over 17m away?
ultrasound
echo!
An echo.
echo
A reflected sound waves is called an echo.
Sound waves cannot travel through an empty space because an empty space is usually a vacuum.
sonar
Sound waves.
9000
because of science