In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. When tension in B is slightly decreased, the beat frequency increases to 7 Hz. If the frequency of A is 530 Hz, the original frequency of B will be :
Beats
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Three sound waves of equal amplitudes have frequencies \((n-1)\), \(n\), \((n+1)\). They superimpose to give beats. The number of beats produced per second will be