The study of sound properties is called acoustics. A concert hall is built so that the music played on the stage is heard and appreciated by the audience.

Reflection of sound in a room makes it sound lively and full. Following factors are to be considered while designing the acoustics of a hall:

• The intensity or the loudness should be same at all points and can be achieved by placing a parabolic sound reflector behind the speaker, so that the sound waves are reflected uniformly throughout.
• Reverberation can be avoided by the use of curtains or soundproof materials on the wall.
• Echo or direct sound reflections from surfaces should be avoided by using sound absorbing materials.
• Interference or focusing should be avoided using Curved regions on the halls.
• Resonance effects should be avoided by selecting the materials of windows; length and height of the air column, so that its natural frequency is different from the audible frequency range.
• The hall must be made soundproof so that no outside noise enters the hall.

MORE INFO