Sound WavesHardBloom L3
Question
A is singing a note and at the same time B is also singing a note with 1/8th the frequency of A. The energies of the two sounds are equal. The displacement amplitude of the note of B is:
Options
A.same as that of A
B.twice that of A
C.four times that of A
D.eight times that of A
Solution
Sol. IA = IB
⇒ (AAωA)2 = (ABωB)2
⇒ AAωA = $A_{B}\frac{\omega_{A}}{8}$
⇒ AB = 8 AA
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