Two sound sources of frequencies and are sounded together

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

Problem

Two sound sources of frequencies

f_1

and

f_2

are sounded together. The beat frequency heard is (a)

\dfrac{f_1+f_2}{2}

(b)

f_1+f_2

(c)

|f_1-f_2|

(d)

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