How can we control reverberation time in a hall?

To control reverberation time, acoustic absorption is used. Absorbent materials conventionally take two forms; fibrous materials or open-celled foam. Fibrous materials absorb sound as sound waves force the fibres to bend and this bending of the fibres generates heat.

How reverberation is useful?

Reverberation effects are frequently used in studios to enhance the depth of sounds. Reverberation modifies the perceived spectral structure of a sound but does not change the pitch.

What is the reverberation time in a concert hall?

Generally, good concert halls have a reverberation time between 1.8 and 2.2 seconds at mid-frequencies.

What is auditorium reverberation time?

In a general-purpose auditorium where you want speech to sound clear and music to sound rich and full, the ideal reverberation time — the time it takes a sound to die away — is around 1.5 seconds to 2.5 seconds.

How do you reduce reverberation time?

When low noise is present, it needs to be constant. Historically the approach has been to reduce the reverberation time by adding absorption from thin 1” fabric wrapped panels on the walls or similar acoustic materials on the ceiling.

How can reverberation be improved?

How to reduce sound reverberation within a room

1. Increase the mass (weight) and density of the wall to make it heavier, as mass helps to block sound.
2. Decouple the wall meaning one side of the wall doesn’t touch the other.
3. Dampen the vibration energy of the wall.

What are school auditoriums used for?

It is used for all types of formal assembly: lectures, award ceremonies, dramatic plays, musical theatre productions, concert performances of orchestra, band, chorus, jazz band, battles of the bands, dance competitions and so on. These varied events place a range of demands on the room.

Why do auditoriums sound different?

Much of the sound we hear in an auditorium is reflected sound. Hard surfaces such as a concrete floor, reflects all the sound. Softer surfaces such as a carpeted floor, absorbs the treble range of frequencies and reflects the bass range. Other surfaces work nearly in an opposite manner.