A Crying Baby Emits Sound with an Intensity of 8

question 61

Multiple Choice

A crying baby emits sound with an intensity of 8.0 × 10^-8 W/m².Calculate a reasonable estimate for the intensity level from a set of quintuplets (five babies) ,all crying simultaneously at the same place? 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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