Why are the ceilings of concert halls, conference halls, and cinema halls generally curved?
Show answer & explanation
Correct answer: A
Explanation
Correct Answer: Option 1 (To ensure sound after reflection reaches all corners of the hall)
Explanation:
Ceilings of concert halls and cinema halls are curved because sound reflection from curved surfaces spreads evenly throughout the hall. This allows sound to be heard clearly by people sitting in every corner of the hall.
Additional Facts
Reflection of Sound: Like light, sound also bounces off surfaces. Curved ceilings act as large sound reflectors.
Reverberation: Sound-deadening materials (such as curtains or fiberboard) are used on the walls to reduce the repeated reflections of sound in the hall.
Stethoscope: This instrument also works on the principle of multiple reflection of sound.
Possible questions for upcoming exams
On what principle of sound does a stethoscope work?
(Answer: Multiple reflection of sound)
What is the minimum distance between the listener and the reflecting surface to hear a clear echo?
(Answer: 17.2 meters)
What is the unit for measuring sound intensity?
(Answer: Decibel - dB)