Which of the following statements is true about concert hall ceilings?

The curved concert hall ceilings are designed in a way that facilitates sound reflection and ensures that sound reaches all corners of the space uniformly. By utilizing the curved surface of the ceiling, sound waves are reflected toward the audience, allowing people sitting even at a long distance away to hear the speech. This design also helps prevent sound from spreading in multiple directions, thus allowing the sound to spread evenly throughout the hall.