Question

(a) for how long does the sensation of a sound persist in our brain?

(b) echo is not heard in a small room why?

(c) the ceilings of concert halls, conference halls and cinema halls are curved. why?

Answer 1

a) sensafion of sound persists in our brain for 0.1 s after exciting the stimulus
b)max. Distance required to hear echo in air is 17m. Thus an echo not heard in small room