MP Board · Class 9 · Science · SoundWhat is reverberation? Why is excessive reverberation undesirable in an auditorium, and what steps can be taken to reduce it?

Reverberation is the persistence of sound in a big hall or enclosed space caused by repeated reflections from walls, ceiling, and floor, even after the sound source has stopped emitting sound.

Why Excessive Reverberation is Undesirable:\nWhen sound persists for too long due to multiple reflections, successive spoken words or musical notes overlap with one another. This causes distortion and blurring of sound, making it difficult for the audience to hear speech or music clearly.

Methods to Reduce Reverberation:

1. Acoustic Coverings: Walls and ceilings are covered with sound-absorbing materials like acoustic tiles, compressed fiberboard, or heavy curtains.
2. Upholstered Seats: Using cushioned and upholstered seats along with carpeted floors to absorb extra sound energy.