There are three sources of sound of equal intensity with frequencies 400, 401 and 402 vib/sec . The number of beats heard per second is

There are two sources of sound of equal intensity with frequencies 400Hz and 408Hz are vibrated together. The number of beats heard per second is

if three sources of sound of equal intensities and having frequencies 300 Hz , 301 Hz and 302 Hz are sounded together, the number of beats heard is

Three sound sources A , B and C have frequencies 400 , 401 and 402 H_(Z) , respectively. Cacluated the number of beats noted per second.

Three sources emitting sound waves of the same amplitude, have frequencies 400 Hz , 401 Hz and 402 Hz , respectively . Find out the number of beats heard per second .