[Rich Grise[_3_]]

Trevor wrote:
"Don Pearce" wrote in message
Echo is a single reflection of a sound - the kind you hear when you
shout "Hello" near a cliff.

Multiple reflections are also common in such instances.

No they are not. One cliff, one echo. No choice.

In the real world cliffs are not usually one straight smooth edge of
course.

That's why an echo is cool - they're relatively rare. :-)

Cheers!
Rich