The ratio of intensities between two coherent sound sources is 4 : 1. The difference of loudness in decibels (dB) between maximum and minimum intensities, when they interfere in space is
(a) 10 log (2)
(b) 20 log (3)
(c) 10 log (3)
(d) 20 log (2)
Correct option: (b) 20 log (3)
Explanation:
