What do echo and reverbation have in common?

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Echo and reverberation both involve the reflection of sound waves off hard surfaces, resulting in the repetition of sound. They share the same frequency, speed, and wavelength as the original sound, as the environment remains unchanged. The key difference lies in the conditions that create each phenomenon; an echo occurs when sound reflects off a surface and returns after a delay, while reverberation is the persistence of sound in an environment due to multiple reflections. The time delay for echoes is typically greater than 0.1 seconds, while reverberation occurs within that timeframe. Understanding these distinctions clarifies their commonalities and differences in sound behavior.
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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?
 
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You don't answer the original question: What do echo and reverberation have in common?
 
What has to be different in the environment to cause an echo versus a reverberation? Why?

Now, what is the common factor?
 

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