Define reverberation and reverberation time

Reverberation:

Reverberation is the echoing of sound within a space.
This means that when sound waves hit surfaces, like walls, they reflect back and mix with the original sound.
The result of this mixing is a continuation of sound even after the original sound source has stopped.
Reverberation can affect the clarity and quality of sound, making it seem muffled or indistinct.
It also contributes to the sense of spaciousness in a room.

Reverberation time is the amount of time it takes for the sound in a space to decrease by 60 decibels.
In other words, it's a measure of how long the sound energy lasts in a room.
This time can be influenced by various factors, such as the size, shape, and materials used in the construction of the room.
A longer reverberation time can create a sense of spaciousness, but can also make it difficult to understand speech or other sounds.
A shorter reverberation time can improve speech intelligibility, but can make a space seem smaller and less live.