Correct option is A
Reverberation is the persistence of sound after the source has stopped emitting sound, and it occurs due to reflection of sound waves from multiple surfaces, such as walls, ceilings, and floors.
Reverberation happens when sound waves reflect repeatedly from surfaces in an enclosed space.
In large halls, excessive reverberation can lead to poor clarity of speech or music, while too little reverberation can make the space sound too dry or dead.
Reverberation time is the time it takes for the sound to decay by 60 dB after the source stops.
Additional Information:
Transmission: Involves the passage of sound through a medium.
Refraction: Refers to the bending of sound waves as they pass through different mediums with varying densities.
Diffraction: Refers to the bending of sound waves around obstacles or openings.