The clarity with which speech or music is heard in a hall depends on the time for which sound persists after the source stops.
(i) Explain how an excessively long reverberation time affects the audience’s ability to understand speech.
(ii) Explain why a reverberation time that is too short can also be undesirable for musical performances.
(iii) With the help of suitable reasoning, state the approximate range of reverberation time generally considered acceptable for clear speech in medium-sized halls.