An echo.
An echo is heard due to the reflection from a rigid obstacle.
Reflection
reflection of sound is the property which causes an echo........
It is called an echo.
Echo.
A wave reflection.
An echo.
An echo is a sound caused by the reflection of sound waves.
An echo is heard due to the reflection from a rigid obstacle.
An echo or reverberation.
Reflection
reflection of sound is the property which causes an echo........
A mirror, an echo and a bouncing ball are three common examples of reflection.
It is called an echo.
Sound can be reflected off things - a reflection of sound is called an "echo" and can be heard.
Reflection