(i) (a) Loudness — amplitude
(b) Pitch — frequency
(ii) Given: t = 3 s, V = 1440 m s^-1, S = ?
Using the expression S = V x t/2 = 1440 x 3/2 = 2160 m
(iii) Reverberation can be reduced by covering the roof and walls with sound absorbent materials like compressed fibreboard, rough plaster or draperies. The seat materials also covered with sound absorbing properties.