From the following, identify the factors which influence the loudness of sound to a listener in an enclosure P. Loudness of sound at sourceQ. Directivity factor R. length/Width ratio of the enclosure S. Distance between sound source and listener U. Sound absorption co-efficient of all enclosing surfaces V. Surface area of enclosing surfacesY. Inside temperature level of the enclosure

• A. P, Q, S, Y, V
• B. Q, R, S, U, Y
• C. P, R, S, U, V
• D. P, Q, S, U, V