If I₀ = 10 ^{- 12} W/m² Is the Threshold

question 9

Multiple Choice

If I₀ = 10 ^{- 12} W/m² is the threshold of hearing, a sound with intensity I₁ = 10 ^{- 10} W/m² will give a certain decibel level. Suppose a new sound has an intensity I₂ = I₁²/I₀. What is the new decibel level?

• A) 40
• B) 20
• C) 10,000
• D) It will square the decibel level.

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