There are three sources of sound of equal intensity with frequencies 400, 401, 402 vibrations per se

Question

There are three sources of sound of equal intensity with frequencies 400, 401, 402 vibrations per sec. The number of beats per sec is\

Professor PC Thomas Classes · Answer

Between 400 and 401 we get 1 beat (A). Between 401 and 402 we get 1 beat ((B). Between 400 and 402 we get 2 beat ((C).\ $\mathrm{A}, \mathrm{B}$ and C will combine and produce 1 beat.\