Beats is the phenomenon of regular variation in the intensity of sound when two sources of nearly equal frequencies are sounded together.
One minima of sound followed by one maxima is said to constitute one beat The essential conditions for production of beats are:
(i) The amplitudes of two waves should be nearly equal.
(ii) The difference in frequencies of two sources must be less than 10 per second
Beat period is the time interval between two successive beats.
Beat frequency is the number of beats produced per second