Imagine a pool of water. If you dropped a rock in the water you would cause ripples that would travel out evenly in all directions. When one of those ripples hits a wall, you can see that the ripple bounces off the wall. Sound works the same way. Sound is basically just ripples in the air (vibrations). When a sound vibration hits a wall it bounces back much like the ripples in water.
in a cave
Any wall in any enclosed room , hill or obstacle about 17 meters away or more will produce an echo.
17.2m
echo
echo
It is mainly in cold and wet areas as well as large,quiet places. Then in that case yup, forests do produce echo.
When one screams in a valley, one will produce an echo. An echo is a reflection of sound, it is arriving at the listener some time after the direct sound.
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The owl's call is often said to not produce an echo due to the unique structure of its feathers that absorb sound. This has been a subject of debate among scientists, with some studies suggesting that owls' calls may indeed produce echoes, but they are simply too quiet to hear.
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One that has not been reflected will not have an echo,
No, an echo is a reflected sound wave and does not have the ability to speak or produce independent sounds. It simply repeats sounds that are made in its vicinity.