What are echos And what are the properties?

Question

It is related to sound

Answer 1

echoes are reflection of sound ways

Answer 2

echos are reflected sound waves, they can be produced by a vibrating body which is at least 17 meters away from the reflecting surface.

Answer 3

They are mimicos demons or copy cat spirits.Don't worry,they are harmless enough as long as you don't try to find them.

Answer 4

http://en.wikipedia.org/wiki/Echos

http://search.yahoo.com/search?fr=ieas&p...

Answer 5

Depending on what you mean by echos,it could be an imprinted residual moment of time.Certain properties of surroundings,such as certain oxides(like that found in a cassette tape FO2) can actually record sounds and trap them in certain places where these chemicals occur naturally or synthetically(ie certain plasters etc)

other than that it is only sound bouncing back at you from a hard surface if you mean the normal definition.