If the intensity of sound is doubled, by how many decibels does the sound level increase?
Physics · Wave Motion
JEE Mains Advanced

Question

If the intensity of sound is doubled, by how many decibels does the sound level increase?

G1 Physics · Accepted Answer

Step 1: Δβ = 10log₁₀(I₂/I₁). Step 2: With I₂/I₁ = 2, Δβ = 10log₁₀2 ≈ 3.0 dB. Final answer: 3 dB.