Concept:Reverberation is the persistence of sound in an enclosed space caused by successive reflections, even after the original sound source stops.
Explanation:When a sound is produced in a closed room, it does not stop immediately after the source ceases.
Instead, the sound waves repeatedly reflect off the walls, ceiling, and floor.
These multiple reflections cause the sound to linger or persist for a short duration.
This persistence due to continuous reflections is called reverberation.
It is different from an echo, which is a single distinct reflected sound heard after a delay.
Reverberation involves many overlapping reflections, not just one.
Therefore, reverberation is a phenomenon associated with multiple reflections of sound, not a single reflection or refraction.
To control undesirable reverberation, auditoriums use sound-absorbing materials like fibreboard or draperies on walls and seats.
Answer:Option B: multiple reflection of sound.
