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## Homework Statement

If I measure a sound

**intensity**of 1.0 at distance

*R*from its source, what intensity would I measure at distance

*3R*in a free, unbounded space? What is the difference in decibels?

&

If I measure a sound

**pressure**of 1.0 at distance

*R*from its source, what pressure would I measure at distance 2

*R*in a free, unbounded space? What is the difference in decibels?

## Homework Equations

N/A

## The Attempt at a Solution

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I am stuck on this. i thought the answer to the first question could be a difference of -18db? Really stuck here...

Thankyou!

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