Question

how can we reduce reverberation in an empty hall ?​

Answer 1

Explanation:

How To Reduce Echo in a Room

Hang Textiles and Wall Art on Parallel Walls. A large canvas painting or cloth textiles will add a little sound absorption to combat echo. ...

Use a Tall Bookcase and Add Objects to the Room. ...

Add an Area Rug on to Bare Floors. ...

Use Acoustic Panels to Enhance Sound Absorption.

Answer 2

Answer:

by placing many object in the room

Explanation:

because it stop the wavelength of the sound