When two sound waves of close frequencies and are heard together

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

When two sound waves of close frequencies

f_1

and

f_2

are heard together, the beat frequency is (a)

\dfrac{f_1+f_2}{2}

(b)

2\,|f_1-f_2|

(c)

|f_1-f_2|

(d)

\dfrac{|f_1-f_2|}{2}