For two sound waves of nearby frequencies f₁ and f₂ producing beats, which statements are correct?
Select all that apply

Question

For two sound waves of nearby frequencies f₁ and f₂ producing beats, which statements are correct?

G1 Physics · Accepted Answer

For two close frequencies, fᵦ = |f₁−f₂|. Therefore the beat period is Tᵦ = 1/fᵦ. Using trigonometric superposition, the rapid carrier factor oscillates at (f₁+f₂)/2. If the frequencies were exactly equal, there would be no beat modulation. Therefore A, B and C are correct.