A Certain Crying Baby Emits Sound with an Intensity of 8.0

question 26

Multiple Choice

A certain crying baby emits sound with an intensity of 8.0 × 10^-8 W/m².What is the intensity level due to a set of five such crying babies,all crying with the same intensity? You can neglect any absorption,reflection,or interference of the sound.The lowest detectable intensity is 1.0 × 10^-12 W/m².

• A)79 dB
• B)69 dB
• C)56 dB
• D)49 dB
• E)36 dB

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