Question
Asked Dec 12, 2019
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Two sound waves arrive to an observer, the first is loud at 2 W/m ^2 and the second one is quieter at 100 mW/m^2 ; how many dB louder is the first one compared to the second one?

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Step 1

Write the expression for the intensity of  first sound.

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[1=2w/m |1, = 10-" w/m? L = 101og 2 w/m? 10-1 w/m = 101og = 123 dB

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Step 2

Write the expression for the in...

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[1 = 0.100 W/m² 1, =10-12 w/m? L =101og I, 0.100 W/m =10log 10- w/m? =110 dB

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