What do echo and reverbation have in common?

[annalian]

Homework Statement

What do echo and reverbation have in common?

Homework Equations

We can hear sounds with a difference of 0.1 seconds. Speed of sound 340 m/S. the distance the sound travels is 34 m. the distance from the wall is 17m.

The Attempt at a Solution

They are the reflection of sound waves, they are formed when sound waves meet a hard surface, they cause a repetition of the sound. The waves keep having the same frequency (the source doesn't change); They have the same speed and length as they had before the reflection, because the environment doesn't change. Is there anything else?

 

[DrClaude]

You don't answer the original question: What do echo and reverberation have in common?

 

[Tom.G]

What has to be different in the environment to cause an echo versus a reverberation? Why?

Now, what is the common factor?