The audio-criterion of an auditorium depends on:
A. Intensity of sound
B. Unstable sound
C. Echo period of sound generated
D. Air Movement
Choose the correct answer from the options given below:

Correct option is A

Correct Option: a)
The design of an auditorium or concert hall should be such that music and sound are clearly audible in every corner. This science is called Acoustics. The quality of sound in any hall depends on several key physical factors that enhance the experience of the listeners (audience).
Information Booster:
The correct option is (a) A, C, and D only. The primary reasons are as follows:
· Intensity of Sound “A”: The sound must be loud enough to be clearly heard even in the back seats.
· This depends on the hall's design and the use of sound-reflecting boards.
· Echo period of sound generated “C”: When sound hits the walls and bounces back, it is called Reverberation.
· If the sound continues to linger for too long (a long echo period), words and musical notes will not be clear.
· For a perfect auditorium, it is essential to balance this time (known as Reverberation Time).
· Air Movement “D”: The direction of air and the temperature affect the speed of sound.
· Proper ventilation and AC flow should be designed so that they do not create obstacles or distortions in the sound path.
Additional Knowledge:
· Unstable Sound “B”: This is not a "criterion" or a good quality for an auditorium; rather, it is a defect or flaw.
· This is why option 'B' is not included in the correct set.
· Sound Absorption: Fabric on seats and walls, or acoustic foam, is used to absorb excessive resonance (extra echo) so that the sound remains crisp.